Walking home one day, you take a short cut along the train tracks. The tracks cross a narrow bridge over a deep gorge. At the point you are 3/8 of the way across the bridge, you hear the train whistle somewhere behind you. You charge across the bridge, and jump off the track as the train is about to run you down. As it happens, if you had gone the other way, you would have reached safety just before being run over as well. If you can run ten miles per hour, how fast is the train moving? -Riddles

Walking home one day, you take a short cut along the train tracks. The tracks cross a narrow bridge over a deep gorge. At the point you are 3/8 of the way across the bridge, you hear the train whistle somewhere behind you. You charge across the bridge, and jump off the track as the train is about to run you down. As it happens, if you had gone the other way, you would have reached safety just before being run over as well. If you can run ten miles per hour, how fast is the train moving? -Riddles
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1 Answer

Answer :

The train is moving at 40 miles per hour. Imagine that a friend is walking with you. When the train whistle blows, you head away from the train, he heads toward it. When he reaches safety, you will be 6/8 (or 3/4)of the way across the bridge, and the train will have just reached the bridge. For the train to cross 4/4 of the bridge in the time you cross the remaining 1/4, the train must be moving four times your speed.
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Related questions

A man walking along a railraod track sees a train thundering at high speed towards him. Instead of immediately jumpimg off the track, he charges directly at the train for about ten feet and only then gets off the track.Why? -Riddles

Description : A man walking along a railraod track sees a train thundering at high speed towards him. Instead of immediately jumpimg off the track, he charges directly at the train for about ten feet and only then gets off the track.Why? -Riddles

Last Answer : The man was on a bridge when he first saw the train so he couldn't jump off the track immediately.

Four members of a band are walking to a night concert. They decide to take a shortcut, but must cross a bridge. Luckily they have one flashlight. Because of the varying size of their instruments, it takes each member a different amount of time to cross the bridge - it takes the first person one minute, the second person two minutes, the third person five minutes and the fourth person ten minutes. They must cross the bridge in pairs, travelling at the slower speed so if the one minute person went with the ten minute person, it would take a total of ten minutes. Since there is only one flashlight, one person must come back across the bridge, then another pair can cross. They only have 17 minutes to cross the bridge and still get to the concert on time. What order should they cross to get eve

Description : Four members of a band are walking to a night concert. They decide to take a shortcut, but must cross a bridge. Luckily they have one flashlight. Because of the varying size of their instruments, it ... bridge and still get to the concert on time. What order should they cross to get eve -Riddles

Last Answer : First, the one minute person and the two minute person must cross the bridge, for a total of two minutes. Then the one minute person should come back with flashlight - total of three ... minutes) and gets the one minute person and they cross together bringing the total to seventeen minutes.

On Broad gauge tracks whistle indicator shall be provided at a distance of ---------- from level crossing along the track a) 400 meters b) 600 meters* c) 350 meters d) 500 meters

Description : On Broad gauge tracks whistle indicator shall be provided at a distance of ---------- from level crossing along the track a) 400 meters b) 600 meters* c) 350 meters d) 500 meters

Last Answer : b) 600 meters*

A detachment of soldiers must cross a river. The bridge is broken, the river is deep. What to do?Suddenly the officer in charge spots two boys playing in a row boat by the shore. The boat is so tiny however, that is could only hold two boys or one soldier.Still all the soldiers make it across the river in the boat. How? -Riddles

Description : A detachment of soldiers must cross a river. The bridge is broken, the river is deep. What to do?Suddenly the officer in charge spots two boys playing in a row boat by the shore. The boat is so ... two boys or one soldier.Still all the soldiers make it across the river in the boat. How? -Riddles

Last Answer : First the boys cross the river and 1 boy comes back and gets a soldier and keeps going back until all the soldiers have made it across safetly.

A train is traveling 20 kilometers per hour. It is .5 kilometers behind you. You want to beat the train to a crossing that is .5 kilometers away. How fast must you run?

Description : A train is traveling 20 kilometers per hour. It is .5 kilometers behind you. You want to beat the train to a crossing that is .5 kilometers away. How fast must you run?

Last Answer : ANSWER: 10 KILOMETERS PER HOUR

A world-famous magician and his young assistant were observed walking slowly along in a department store when suddenly they both stopped walking and began to slowly rise from the floor. The two continued to rise majestically until they had reached a height of 20 feet. Numerous store customers and a security guard witnessed the event, but no one seemed shocked by what they had seen, and no report of the occurrence ever reached the news media. The secrets of magic are not supposed to be revealed, but how would you speculate the magician and his assistant accomplished this feat, and why didn’t the onlookers express amazement? -Riddles

Description : A world-famous magician and his young assistant were observed walking slowly along in a department store when suddenly they both stopped walking and began to slowly rise from the floor. The two ... and his assistant accomplished this feat, and why didn't the onlookers express amazement? -Riddles

Last Answer : The magician and his assistant were simply using an escalator to go up to the next floor in the department store.

A train overtakes two persons walking along a railway track. The first one walks at 4.5 km/hr. The other one walks at 5.4 km/hr. The train needs 8.4 and 8.5 seconds respectively to overtake them. What is the speed of the train if both the persons are walking in the same direction as the train? A.59 km/hr B.65 km/hr C.70 km/hr D.81 km/hr E. None of these

Description : A train overtakes two persons walking along a railway track. The first one walks at 4.5 km/hr. The other one walks at 5.4 km/hr. The train needs 8.4 and 8.5 seconds respectively to overtake them. What is the speed ... as the train? A.59 km/hr B.65 km/hr C.70 km/hr D.81 km/hr E. None of these

Last Answer : Answer-D (81 km/hr) Explanation4.5 km/hr =(4.5 x 5/18)m/sec =5m/4sec = 1.25 m/sec, and 5.4 km/hr =(5.4 x 5/18)m/sec =3m/2sec = 1.5 m/sec. Let the speed of the train be x m/sec. Then, (x - 1.25) ... - 12.75 => 0.1x = 2.25 => x = 22.5 Therefore Speed of the train =(22.5 x18 /5)km/hr = 81 km/hr.

A Superfast train overtakes two persons walking along a railway track. The first one walks at 9 km/hr. The other one walks at 10.8 km/hr. The train needs 16.8and 17seconds respectively to overtake them. What is the speed of the train if both the persons are walking in the same direction as the train? A) 250 kmph B) 487kmph C) 162kmph D) 312kmph

Description : A Superfast train overtakes two persons walking along a railway track. The first one walks at 9 km/hr. The other one walks at 10.8 km/hr. The train needs 16.8and 17seconds respectively to overtake them. ... are walking in the same direction as the train? A) 250 kmph B) 487kmph C) 162kmph D) 312kmph

Last Answer : ANSWER:C Explanation:  Given that the first one walks at 9 km/hr convert the speed in the unit of m/sec  9 km/hr = (9*5/18) m/s  = 5/2 m/s  = 2.5 m/s  Another one walks at 10.8 km/hr ... the speed in the unit of km/hr  Speed of the train = (45*18/5)kmph  Speed of the train = 162 km/ hr

A train overtakes two girls walking along a railway track. The first girl walks at 9 km/hr. The other girl walks at 10.8 km/hr. The train needs 16.8 and 17 seconds respectively to overtake them. What is the speed of the train if both the girls are walking in the same direction as the train? A) 25 m/s B) 45 m/s C) 30m/s D) 40m/s

Description :  A train overtakes two girls walking along a railway track. The first girl walks at 9 km/hr. The other girl walks at 10.8 km/hr. The train needs 16.8 and 17 seconds respectively to overtake them. What is the speed of the ... in the same direction as the train? A) 25 m/s B) 45 m/s C) 30m/s D) 40m/s

Last Answer : ANSWER:B Explanation:  First girl speed = 9km/hr  = 9 * 5 / 18 m/s  = 5/2 m/s  = 2.5 m/s  second girl speed = 10.8 km/hr  = 10.8 * 5/18 m/s  = 54/18  = 3 m/s  Let the speed of the train ... x - 3) * 17  16.8x - 42 = 17x - 51  0.2x = 9  x = 45  Therefore the speed of the train is 45 m/s

A man decided to go for a walk. He made numerous stops during his stroll, hoping to hear some good news each time he stopped. Despite his usual excellent sense of direction, he realized he had been walking in circles. He was certain of this, as he noticed his favorite number 8 kept reappearing before his eyes. After continuing his walk for a long time, he finally received the good news he had been hoping for; and he then returned home, a little poorer than when he had started, but glad to be leaving with the sweet love of his life. What was going on in this bizarre-sounding narrative, and who/what was the sweet love of his life which was mentioned? -Riddles

Description : A man decided to go for a walk. He made numerous stops during his stroll, hoping to hear some good news each time he stopped. Despite his usual excellent sense of direction, he realized he had ... bizarre-sounding narrative, and who/what was the sweet love of his life which was mentioned? -Riddles

Last Answer : The man gave a monetary donation to participate in a cake walk. Eventually, his number was called for the space he was standing on, and he went home with the dessert he truly loved ———— a beautiful cake!

A girl is walking at a speed of 15 km/hr along a railway track. If she is 600 m ahead of the train which is 300 m long and runs at a speed of 180 km/hr in same direction, then what is the time required to pass a girl? A) 19.63sec B) 32sec C) 8.2sec D) 28.3sec

Description : A girl is walking at a speed of 15 km/hr along a railway track. If she is 600 m ahead of the train which is 300 m long and runs at a speed of 180 km/hr in same direction, then what is the time required to pass a girl? A) 19.63sec B) 32sec C) 8.2sec D) 28.3sec

Last Answer : ANSWER:A Explanation:  Speed of a girl = 15 km/hr  speed of train = 180 km/hr By using the condition, The speed values of train and the moving object are subtracted if they are moving in same ... /45.83 = 19.63  Hence the time taken by the train to cross the girl is 19.63seconds

A and B walk around a circular track. They start at 8 a.m. from the same point in the opposite directions. A and B walk at a speed of 2 rounds per hour and 3 rounds per hour respectively. How many times shall they cross each other before 9.30 a.m.? A.15 B.8 C.7 D.10 E.None of these

Description : A and B walk around a circular track. They start at 8 a.m. from the same point in the opposite directions. A and B walk at a speed of 2 rounds per hour and 3 rounds per hour respectively. How many times shall they cross each other before 9.30 a.m.? A.15 B.8 C.7 D.10 E.None of these

Last Answer : Answer – C (7) Explanation – Relative speed = (2 + 3) = 5 rounds per hourSo, they cross each other 5 times in an hour and 2 times in half an hourHence, they cross each other 7 times before 9.30 a.m.

There was a fat man. He was being chased by zombies. The only way to get away was to cross a rope bridge. The rope bridge could only carry 80kg and the man was 79kg. The fat man had 2 things he needed to carry. Each weighed 1kg. How was he going to get across? -Riddles

Description : There was a fat man. He was being chased by zombies. The only way to get away was to cross a rope bridge. The rope bridge could only carry 80kg and the man was 79kg. The fat man had 2 things he needed to carry. Each weighed 1kg. How was he going to get across? -Riddles

Last Answer : Juggle the 2 things while getting across.

In the early 1900’s in England, there was two towns: town A and town B, and there was a huge river in between them. The only way across to each town was by a long bridge with a guard post in the middle. It took 20 minutes to cross the bridge from one side to the other and 10 minutes each way from the guards tower. There were no hiding spots on the bridge so people couldn’t sneak past, and the guard comes out every 5 minutes or so to check to see if anyone is trying to cross. The guards tower was placed because of a law that stated that no one was aloud to leave their own town into the other because of political reasons and anyone who was caught by the guard would be fined and told to turn back. Many people have tried to cross but have always been caught, even very fast runners have only ab

Description : In the early 1900's in England, there was two towns: town A and town B, and there was a huge river in between them. The only way across to each town was by a long bridge with a guard ... back. Many people have tried to cross but have always been caught, even very fast runners have only ab -Riddles

Last Answer : Did you get it? The answer is that they went up close to the guards tower, turned around and started walking back to the town they came from, the guard caught them and assumed that they came ... way and sent them back! Hope you enjoyed this, please subscribe and check back soon for more riddles!

A freight car weighing 20 tons and moving at a speed of 7 miles per hour on a horizontal track collides and couples with a stationary car that weighs 15 tons. Neglecting friction, determine the velocity of the coupled cars.

Description : A freight car weighing 20 tons and moving at a speed of 7 miles per hour on a horizontal track collides and couples with a stationary car that weighs 15 tons. Neglecting friction, determine the velocity of the coupled cars.

Last Answer : ANSWER: 4 MILES PER HOUR

Buying a 102 decibel whistle for walking my dog and wonder if I have to blow it for safety, if the dog's ears and my ears will be okay?

Description : Buying a 102 decibel whistle for walking my dog and wonder if I have to blow it for safety, if the dog's ears and my ears will be okay?

Last Answer : I can’t imagine an emergency in which you would need that kind of whistle. If you have a true emergency in which someone is attacking you, I would have a can of pepper spray instead of a whistle.

I move at a high speed or so you'd think by my name. I have a large jaw with many teeth that I open and close with a buzz. Like a train on a broken track, I run up and down your spine. What am I? -Riddles

Description : I move at a high speed or so you'd think by my name. I have a large jaw with many teeth that I open and close with a buzz. Like a train on a broken track, I run up and down your spine. What am I? -Riddles

Last Answer : A Zipper.

Railway tracks are banked on curves so that : (1) the train may not fall down inwards. (2) the weight of the train may be reduced. (3) necessary centripetal force may be obtained from the horizontal component of the normal reaction due to track. (4) no frictional force may be produced between the wheels and the track.

Description : Railway tracks are banked on curves so that : (1) the train may not fall down inwards. (2) the weight of the train may be reduced. (3) necessary centripetal force may be obtained from the ... normal reaction due to track. (4) no frictional force may be produced between the wheels and the track.

Last Answer : (3) necessary centripetal force may be obtained from the horizontal component of the normal reaction due to track. Explanation: A vehicle moving at a fast speed on a straight rail/ road has ... it experiences an additional force, termed as centripetal force, acting towards the centre of the circle.

Trains travel from one town to another town all day, always on the same track, always going nonstop and at the same speed. The noon train took 80 minutes to complete the trip, but the 4 PM train took an hour and 20 minutes. Why? -Riddles

Description : Trains travel from one town to another town all day, always on the same track, always going nonstop and at the same speed. The noon train took 80 minutes to complete the trip, but the 4 PM train took an hour and 20 minutes. Why? -Riddles

Last Answer : 80 minutes is the same as an hour and 20 minutes.

A small gap is left at the joints of rails in a railway track to – (1) avoid the tracks being distorted due to seasonal temperature variation (2) avoid the heating of tracks to high temperature (3) control the speed of train (4) keep the rails equidistant

Description : A small gap is left at the joints of rails in a railway track to – (1) avoid the tracks being distorted due to seasonal temperature variation (2) avoid the heating of tracks to high temperature (3) control the speed of train (4) keep the rails equidistant

Last Answer : (1) avoid the tracks being distorted due to seasonal temperature variation Explanation: A small gap is left at the joints of rails in a railway track to provide space for the expansion of rail pieces when the temperature rises during summer.

A small gap is left at the joints of rails in a railway track to (1) avoid the tracks being distorted due to seasonal temperature variation (2) avoid the heating of tracks to high temperature (3) control the speed of train (4) keep the rails equidistant

Description : A small gap is left at the joints of rails in a railway track to (1) avoid the tracks being distorted due to seasonal temperature variation (2) avoid the heating of tracks to high temperature (3) control the speed of train (4) keep the rails equidistant

Last Answer : avoid the tracks being distorted due to seasonal temperature variation

It takes 60 sec for a train running at 162 km/hr to cross a bridge. And it takes 36 sec for the same speed to cross a boy walking at the rate of 18km/hr in the same direction in which the train is running. What is the length of the train and length of the platform. A) 1440 &1260m B) 1220 &60m C) 1000 & 1460m D) 1260 &1450m

Description : It takes 60 sec for a train running at 162 km/hr to cross a bridge. And it takes 36 sec for the same speed to cross a boy walking at the rate of 18km/hr in the same direction in which the train is ... the train and length of the platform. A) 1440 &1260m B) 1220 &60m C) 1000 & 1460m D) 1260 &1450m

Last Answer : ANSWER: A  Explanation:  Relative speed of the train to man = (162 - 18)  = 144km/hr  Convert km/hr into m/s  144km/hr = (144 * 5 /18) m/s  = 40 m/s  When the train passes ... of bridge = 2700  length of bridge = 1260 m  the length of the bridge & train are 1260 and 1440m

A group of campers have been on vacation so long, that they've forgotten the day of the week. The following conversation ensues.Darryl: What's the day? I don't think it is Thursday, Friday or Saturday.Tracy: Well that doesn't narrow it down much. Yesterday was Sunday.Melissa: Yesterday wasn't Sunday, tomorrow is Sunday.Ben: The day after tomorrow is Saturday.Adrienne: The day before yesterday was Thursday.Susie: Tomorrow is Saturday.David: I know that the day after tomorrow is not Friday.If only one person's statement is true, what day of the week is it? -Riddles

Description : A group of campers have been on vacation so long, that they've forgotten the day of the week. The following conversation ensues.Darryl: What's the day? I don't think it is Thursday, Friday or Saturday. ... is not Friday.If only one person's statement is true, what day of the week is it? -Riddles

Last Answer : It is Wednesday. If it was any other day of the week, more than one statement would be true. To solve the riddle, evaluate each person's statement and write down what day it ... Saturday Ben: Thursday Adrienne: Saturday Susie: Friday David: Sunday, Monday, Tuesday, Thursday, Friday or Saturday

There are 10 dogs in a yard. 3 go out, 4 run behind a tree, and 2 jump in the hole. How many are left? -Riddles

Description : There are 10 dogs in a yard. 3 go out, 4 run behind a tree, and 2 jump in the hole. How many are left? -Riddles

Last Answer : 10. Because none of them left the yard.

You are lost in a forest, and you must get home before dark. Whilst walking through the forest, you come across three paths. The first path leads to a lion. The second path leads to a tiger. The third path leads to a jaguar. Which path do you take? -Riddles

Description : You are lost in a forest, and you must get home before dark. Whilst walking through the forest, you come across three paths. The first path leads to a lion. The second path leads to a tiger. The third path leads to a jaguar. Which path do you take? -Riddles

Last Answer : Take the Jaguar, because it's a car.

A train is moving eastward at 10 m/sec. A waiter is walking eastward at 1.2m/sec; and a fly is flying toward the north across the waiter’s tray

Description : A train is moving eastward at 10 m/sec. A waiter is walking eastward at 1.2m/sec; and a fly is flying toward the north across the waiter’s tray

Last Answer : A train is moving eastward at 10 m/sec. A waiter is walking eastward at 1.2m/sec; and a fly ... . What is the velocity of the fly relative to Earth.

A woman who lived in Germany during World War II wanted to cross the German/Swiss border in order to escape Nazi pursuers. The bridge which she is to cross is a half mile across, over a large canyon. Every three minutes a guard comes out of his bunker and checks if anyone is on the bridge. If a person is caught trying to escape German side to the Swiss side they are shot. If caught crossing the other direction without papers they are sent back. She knows that it takes at least five minutes to cross the bridge, in which time the guard will see her crossing and shoot her. How does she get across? -Riddles

Description : A woman who lived in Germany during World War II wanted to cross the German/Swiss border in order to escape Nazi pursuers. The bridge which she is to cross is a half mile across, over a large canyon. ... , in which time the guard will see her crossing and shoot her. How does she get across? -Riddles

Last Answer : She waits until the guard is inside his hut, then walks halfway across before starting to walk back. The guard, seing she has no papers, sends her 'back'.

Mr. Grumper grumbles about bad time-keeping trains like everybody else. On one particular morning he was justified, though. The train left on time for the one hour journey and it arrived 5 minutes late. However, Mr. Grumper's watch showed it to be 3 minutes early, so he adjusted his watch by putting it forward 3 minutes. His watch kept time during the day, and on the return journey in the evening the train started on time, according to his watch, and arrived on time, according to the station clock. If the train traveled 25 percent faster on the return journey than it did on the morning journey, was the station clock fast or slow, and by how much? -Riddles

Description : Mr. Grumper grumbles about bad time-keeping trains like everybody else. On one particular morning he was justified, though. The train left on time for the one hour journey and it arrived 5 minutes late. ... did on the morning journey, was the station clock fast or slow, and by how much? -Riddles

Last Answer : The station clock is 3 minutes fast. The morning journey took 65 minutes, and the evening journey therefore took 52 minutes, and the train arrived 57 minutes after it should have left, that is, 3 minutes early.

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height? -Riddles

Description : A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height? -Riddles

Last Answer : Nine Years.

A frog fell into a well 12 feet deep. He could jump 3 feet, but every time he jumped 3 feet, he fell back 2 feet. How many times did he have to jump to get out of the well? -Riddles

Description : A frog fell into a well 12 feet deep. He could jump 3 feet, but every time he jumped 3 feet, he fell back 2 feet. How many times did he have to jump to get out of the well? -Riddles

Last Answer : The tenth jump took him out. (On the tenth jump he reached 13 feet and was out.)

When is the time of a clock like the whistle of a train? -Riddles

Description : When is the time of a clock like the whistle of a train? -Riddles

Last Answer : When it's two to two.

Dynamite is a tool that can be used to cut down trees. To cut a tree 18 inches in diameter requires five sticks of dynamite: one on the north, south, east and west sides of the tree, and the fifth stick on the side to which the tree should fall. During construction of a dam, a tree 18 inches in diameter was completely covered by water. Since the treetop was fouling the boat's propellers, it had to be cut down. A diver went down and put a stick of dynamite on the four sides of the tree. Since the current is flowing south at 2 knots per hour, on which side of the tree would you instruct the diver to put the fifth stick of dynamite if you wanted the tree to fall north? -Riddles

Description : Dynamite is a tool that can be used to cut down trees. To cut a tree 18 inches in diameter requires five sticks of dynamite: one on the north, south, east and west sides of the tree, and the ... you instruct the diver to put the fifth stick of dynamite if you wanted the tree to fall north? -Riddles

Last Answer : It doesn't matter where the fifth stick is placed, since the tree won't fall in any direction. Being wood, it will float and rise to the surface.

There are two cliffs. They are each attached by a suspension bridge that takes 5 minutes to walk across, and is the only way to get to the other side. No one is allowed to cross the bridge unless authorized. There is a guard on the other side that takes a nap every 5 minutes, then keeps watch for 5 minutes, takes a nap for 5 minutes, and so on. Let's say you don't have authorization. How would you get across (Remember, he wakes up EXACTLY after 5 minutes, meaning if you go on the bridge the second he takes a nap, and you cross the bridge, he'll wake up exactly when you reach the other side, and send you back)? -Riddles

Description : There are two cliffs. They are each attached by a suspension bridge that takes 5 minutes to walk across, and is the only way to get to the other side. No one is allowed to cross the bridge unless ... the bridge, he'll wake up exactly when you reach the other side, and send you back)? -Riddles

Last Answer : You can't go as he is awake, he'll see you, but go when he doesn't see you. Then, turn back as he is waking up, pretending to go to the side you came from. Then, he'll figure you are unauthorized to set foot on the bridge, and send you to the side you want to get to.

I can carry you around; you can carry me as well; not a living thing, yet, I run faster than as you do but not without your help. I have as many legs and hands as every man has; round are my legs: one before and the other behind. The cycle is never out of my name. What am I? -Riddles

Description : I can carry you around; you can carry me as well; not a living thing, yet, I run faster than as you do but not without your help. I have as many legs and hands as every man has; round are my legs: one before and the other behind. The cycle is never out of my name. What am I? -Riddles

Last Answer : Bicycle.

A simple peasant bought a number of camels and is taking them to his farm. As he rides contentedly along he counts them - he counts 29. He was sure he had bought 30 camel, so in alarm he jumps off his camel and counts the camels again. To his delight there are 30. Half an hour later, he counts his camels and once more there are just 29. Confused, he climbs off his camel and counts again. Once more there are 30. Can you explain? -Riddles

Description : A simple peasant bought a number of camels and is taking them to his farm. As he rides contentedly along he counts them - he counts 29. He was sure he had bought 30 camel, so in alarm he jumps ... Confused, he climbs off his camel and counts again. Once more there are 30. Can you explain? -Riddles

Last Answer : When he is on the camel he omits to count it.

Taking that internship in a remote mountain lab might not have been the best idea. Pulling that lever with the skull symbol just to see what it did probably wasn’t so smart either. But now is not the time for regrets because you need to get away from these mutant zombies...fast. Can you use math to get you and your friends over the bridge before the zombies arrive? Alex Gendler shows how. -Riddles

Description : Taking that internship in a remote mountain lab might not have been the best idea. Pulling that lever with the skull symbol just to see what it did probably wasn't so smart either. But now is ... to get you and your friends over the bridge before the zombies arrive? Alex Gendler shows how. -Riddles

Last Answer : At first it might seem like no matter what you do, you're just a minute or two short of time, but there is a way. The key is to minimize the time wasted by the two slowest people by having ... far side of the gorge, you cut the ropes and collapse the bridge behind you, just in the nick of time.

A student zips on his scooter to ride to the train station to get to college. His home is close to two stops; the first one is a mile from home, and the second is two miles from home in the opposite direction. In the morning, he always gets on at the first stop and in the afternoon, he always gets off at the second one.Why? -Riddles

Description : A student zips on his scooter to ride to the train station to get to college. His home is close to two stops; the first one is a mile from home, and the second is two miles from home in the ... gets on at the first stop and in the afternoon, he always gets off at the second one.Why? -Riddles

Last Answer : The sations and his home are on a hill, which allows him to ride down easily on his scooter.

If an electric train is going east at 60 miles an hour and there is a strong westerly wind, which way does the smoke from the train drift?

Description : If an electric train is going east at 60 miles an hour and there is a strong westerly wind, which way does the smoke from the train drift?

Last Answer : A: There is no smoke coming from electric trains.

A train 100 m long is moving with the velocity of 72 km/hr. Find the time it takes to cross the bridge which is 2 km long? -Science

Description : A train 100 m long is moving with the velocity of 72 km/hr. Find the time it takes to cross the bridge which is 2 km long? -Science

Last Answer : Given Lenght of Train = 100m , velocity = 72 km/hr = 20 m/s, Lenght of the Bridge =2 Km. Total distance covered by the train to fully pass the bridge = 2000 + 100 = 2100 m So, time taken time=distancevelocity=210020=105sectime=distancevelocity=210020=105sec

Senthil started bike at 5 a.m to reach a temple. After going temple, his bike went out of order. Consequently he rested for 45 mins and came back to his house walking all the way. Senthil reached home at 8 a.m. if bike speed is 20 km/hr and his walking speed is 1 km/hr, then on bike he covered a distance of. a) 3.12 b) 2.76 c) 4.13 d) 2.14

Description : Senthil started bike at 5 a.m to reach a temple. After going temple, his bike went out of order. Consequently he rested for 45 mins and came back to his house walking all the way. Senthil reached home at 8 a.m. if bike ... /hr, then on bike he covered a distance of. a) 3.12 b) 2.76 c) 4.13 d) 2.14

Last Answer : D Time taken = 2 hr 15 mins = 2 ¼ hrs Time = 9/4 hrs Let the required distance be x km Then x/20 + x/1 = 9/4 (X+20x) / 20 = 9/4 21x / 20 = 9/4 84x = 180 X= 2.14 km Therefore the required diatance is 2.14 km

We are three brothers, running behind each other. Always running round our mother: one after the other, yet no matter how fast we run, we never touches each other. What are we? -Riddles

Description : We are three brothers, running behind each other. Always running round our mother: one after the other, yet no matter how fast we run, we never touches each other. What are we? -Riddles

Last Answer : Fan blades.

Two trains, both 50m long, moving in opposite directions cross each other in 4 seconds. If one is moving thrice as fast the other, then the speed of the faster train is. A) 45km/hr B) 19 km/hr C) 95 km/hr D) 67.5 km/hr

Description : Two trains, both 50m long, moving in opposite directions cross each other in 4 seconds. If one is moving thrice as fast the other, then the speed of the faster train is. A) 45km/hr B) 19 km/hr C) 95 km/hr D) 67.5 km/hr

Last Answer : ANSWER:D Explanation:  Let the speed of the slower train be x' m/sec  The speed of the sfaster train = 3x m/s  Relative speed = (x +3x)m/sec  = 4x m/sec  50 + 50 / 4 = 4x  100 / 4 = 4x  100 = 16x  x = 100 ... the faster train = 3 * 25 / 4  = 75 / 4 m/s = (75/4 *18 /5)km/hr  = 67.5 km/hr

I stand when I am sitting and I jump when I am walking. What am I? -Riddles

Description : I stand when I am sitting and I jump when I am walking. What am I? -Riddles

Last Answer : A kangaroo.

A young boy needs to cross a bridge that can only hold 100 pounds of weight. The young boy weighs 98 pounds. The young boy also has 3 balls that each weigh 1 pound each. The young boy needs to get across the bridge with all the balls at the exact same time.How does he get across the bridge with all 3 balls at the same time? -Riddles

Description : A young boy needs to cross a bridge that can only hold 100 pounds of weight. The young boy weighs 98 pounds. The young boy also has 3 balls that each weigh 1 pound each. The young boy needs to get ... the exact same time.How does he get across the bridge with all 3 balls at the same time? -Riddles

Last Answer : The Boy juggles all 3 balls while he walks across the bridge.

A man and his wife were slowly driving along when their teenage son, who had just recently received his driver's license, suddenly drove his car up behind them and started to repeatedly smash into the back of their car, while his sister, who was in the car with him, loudly cheered and egged on her brother. Witnesses to the event appeared unaffected by the incident, and in fact some were even observed smiling. The police were never called. What was going on with this family, and why did no one call the police? -Riddles

Description : A man and his wife were slowly driving along when their teenage son, who had just recently received his driver's license, suddenly drove his car up behind them and started to repeatedly smash into the back ... called. What was going on with this family, and why did no one call the police? -Riddles

Last Answer : The man and his wife had taken their two children to an amusement park. The parents were in one bumper car, and their two children were in another bumper car.

When the nurse auscultates chest sounds that are harsh and cracking, sounding like two pieces of leather being rubbed together, she records her finding as a) pleural friction rub. A pleural friction rub is heard secondary to inflammation and loss of lubricating pleural fluid. b) crackles. Crackles are soft, high-pitched, discontinuous popping sounds that occur during inspiration. c) sonorous wheezes. Sonorous wheezes are deep, low-pitched rumbling sounds heard primarily during expiration. d) sibilant wheezes. Sibilant wheezes are continuous, musical, high-pitched, whistle-like sounds heard during inspiration and expiration.

Description : When the nurse auscultates chest sounds that are harsh and cracking, sounding like two pieces of leather being rubbed together, she records her finding as a) pleural friction rub. A ... wheezes are continuous, musical, high-pitched, whistle-like sounds heard during inspiration and expiration.

Last Answer : a) pleural friction rub. A pleural friction rub is heard secondary to inflammation and loss of lubricating pleural fluid.