A boy leaves home in the morning to go to school. At the moment he leaves the house he looks at the clock in the mirror. The clock has no number indication and for this reason the boy makes a mistake in interpreting the time (mirror-image). Just assuming the clock must be out of order, the boy cycles to school, where he arrives after twenty minutes. At that moment the clock at school shows a time that is two and a half hours later than the time that the boy saw on the clock at home. -Riddles

A boy leaves home in the morning to go to school. At the moment he leaves the house he looks at the clock in the mirror. The clock has no number indication and for this reason the boy makes a mistake in interpreting the time (mirror-image). Just assuming the clock must be out of order, the boy cycles to school, where he arrives after twenty minutes. At that moment the clock at school shows a time that is two and a half hours later than the time that the boy saw on the clock at home. -Riddles
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1 Answer

Answer :

The difference between the real time and the time of the mirror image is two hours and ten minutes (two and a half hours, minus the twenty minutes of cycling). Therefore, the original time on the clock at home that morning could only have been five minutes past seven: The difference between these clocks is exactly 2 hours and ten minutes (note that also five minutes past one can be mirrored in a similar way, but this is not in the morning!). Conclusion: The boy reaches school at five minutes past seven plus twenty minutes of cycling, which is twenty-five minutes past seven!...
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Related questions

A watchmaker was telephoned urgently to make a house call to replace the broken hands on a clock. He was sik so he sent his apprentice.The apprentice was thorough. When he finished inspecting the clock it was dark. Assuming his work was done, he attached the new hands and set the clock by his pocket watch. It was sic o'clock, so he set the big hand at the 12 and the little hand at the 6.The apprectice returned, but soon the telephone rang. He picked up to his angry client:'You didn't do the job right. The clock shows the wrong time.'Surprised he hurried back. He found the clock showing not much past eight. He handed is watch to the client and showed her that her clock was not even one second late. The client had to agree.Early the nect morning, the client telephoned to say the clock has ap

Description : A watchmaker was telephoned urgently to make a house call to replace the broken hands on a clock. He was sik so he sent his apprentice.The apprentice was thorough. When he finished inspecting the clock ... had to agree.Early the nect morning, the client telephoned to say the clock has ap -Riddles

Last Answer : As the problem says the apprentice mixed up the hands so that the minute hand was short and the hour hand was long. The first time the apprentice returned to the client was about 2 hours and 10 ... hand made 13 full circles and 5 minutes, reaching 7, So the clock showed the correct time again.

An alarm clock runs 4 minutes slow every hour. It was set right 3 1/2 hours ago. Now another clock which is correct shows noon. In how many minutes, to the nearest minutes, to the nearest minute, will the alarm clock show noon? -Riddles

Description : An alarm clock runs 4 minutes slow every hour. It was set right 3 1/2 hours ago. Now another clock which is correct shows noon. In how many minutes, to the nearest minutes, to the nearest minute, will the alarm clock show noon? -Riddles

Last Answer : In 3 1/2 hours the alarm clock has become 14 minutes slow. At noon the alarm clock will fall behind approximently an additional minute. Its hands will show noon in 15 minutes.

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.

The title of the problem tells you how to approach these four questions.(A). A bus leaves Moscow for Tula at noon. An hour later a cyclist leaves Tula for mosco, moving slower than the bus. When the bus and cyclist meet, which one of the two will be farther from Moscow?(B). Which is worth more: a pound of $10 gold peices or half a pound of $20 gold pieces?(C). At six o'clock the wall clock struck 6 times. Checking with my watch, I noticed the time between the first and last strokes was 30 seconds. How long will the clock take to strike 12 at midnight?(D). Three swallows fly outward from a point. When will they all be on the same plane in space?Now check the answers. Did you fall into any of the traps which lurk in these simple problems? -Riddles

Description : The title of the problem tells you how to approach these four questions.(A). A bus leaves Moscow for Tula at noon. An hour later a cyclist leaves Tula for mosco, moving slower than the bus. ... Now check the answers. Did you fall into any of the traps which lurk in these simple problems? -Riddles

Last Answer : (A). Neither (B). A pound of metal is always more than half a pound of the same metal. (C). Six strokes took 30 seconds, therefore 12 strokes will take 60 seconds. But when the clock struck ... , therefore 12 strokes will take 66 seconds. (D). There is always a plane that contains any 3 points

There was a boy named Bob. Bob really loved apples. One time, he took a basket full of apples and ran to his house behind the owner of the apples. The owner saw Bob running back to his house and didn't ran after. Why? -Riddles

Description : There was a boy named Bob. Bob really loved apples. One time, he took a basket full of apples and ran to his house behind the owner of the apples. The owner saw Bob running back to his house and didn't ran after. Why? -Riddles

Last Answer : The basket of apples are free.

A boy was at a carnival and went to a booth where a man said to the boy, 'If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50.' The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50.How did the man win the bet? -Riddles

Description : A boy was at a carnival and went to a booth where a man said to the boy, 'If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50.' ... more or less. In the end the boy ended up paying the man $50.How did the man win the bet? -Riddles

Last Answer : The man did exactly as he said he would and wrote 'your exact weight' on the paper

A boy was at a carnival and went to a booth where a man said to the boy, 'If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50.' The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet? -Riddles

Description : A boy was at a carnival and went to a booth where a man said to the boy, 'If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50.' ... more or less. In the end the boy ended up paying the man $50. How did the man win the bet? -Riddles

Last Answer : The man did exactly as he said he would and wrote 'your exact weight' on the paper.

A boy was at a carnival and went to a booth where a man said to the boy, 'If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50.' The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet? -Riddles

Description : A boy was at a carnival and went to a booth where a man said to the boy, 'If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50.' ... more or less. In the end the boy ended up paying the man $50. How did the man win the bet? -Riddles

Last Answer : The man did exactly as he said he would and wrote 'your exact weight' on the paper.

A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The special mirror is made up of three types of mirrors in the following order from top downwards: (a) Convex, Plane, Concave (b) Plane, Convex, Concave (c) Concave, Plane, Convex (d) Convex, Concave, Plan

Description : A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The ... , Plane, Concave (b) Plane, Convex, Concave (c) Concave, Plane, Convex (d) Convex, Concave, Plan

Last Answer : (c) Concave, Plane, Convex

Alycia left for school at go to do it in the morning and arrived home 7 1/2 hours later. What time was it when alycia arrived home?

Description : Alycia left for school at go to do it in the morning and arrived home 7 1/2 hours later. What time was it when alycia arrived home?

Last Answer : Sorry she left school at 7:45

What are the final values of Q1 and Q0 after 4 clock cycles, if initial values are 00 in the sequential circuit shown below: Image (A) 11 (B) 10 (C) 01 (D) 00

Description : What are the final values of Q1 and Q0 after 4 clock cycles, if initial values are 00 in the sequential circuit shown below: (A) 11 (B) 10 (C) 01 (D) 00

Last Answer : (D) 00

An employee of a store went up to his manager and said, 'can I go to Paris for a week'? 'Yes,' said the manager 'but remember to show me a picture of you at Paris' 'yes sir,' said the employee. The next day the employee showed him a picture of him in Paris, he saw a clock a big tv and him on the couch. Right away he knew that he had lied. How did he know? -Riddles

Description : An employee of a store went up to his manager and said, 'can I go to Paris for a week'? 'Yes,' said the manager 'but remember to show me a picture of you at Paris' 'yes sir,' said the employee. ... clock a big tv and him on the couch. Right away he knew that he had lied. How did he know? -Riddles

Last Answer : The clock was showing the same time as the clock that was sitting on the manager's wall.

A retired zookeeper owned a huge house with a very large and beautifully landscaped yard. The neighbors of the man drove past his home daily, and admired his arrangement of all the large trees and numerous healthy bushes which adorned the front yard. One day, a neighbor drove by the former zookeeper's house, and was astonished to see a living, fully-grown ostrich standing in the yard. A week later, neighbors reported seeing a live, fully-grown bear standing near the ostrich. As the next few weeks passed, the neighbors saw a tiger, a lion, a hippopotamus, and finally an elephant appear in the yard of the retired zookeeper --- all fully- grown and alive, but without any cages or bars to protect the neighborhood from them. Amazingly, not one person who lived in that area ever expressed any fe

Description : A retired zookeeper owned a huge house with a very large and beautifully landscaped yard. The neighbors of the man drove past his home daily, and admired his arrangement of all the large trees and ... from them. Amazingly, not one person who lived in that area ever expressed any fe -Riddles

Last Answer : The retired zookeeper was also a professional topiary expert. Mixing together the best of his two worlds, he sculpted zoo animals from his fully-grown, healthy, living bushes in his front yard, much to the delight of his neighbors.

A man was just doing his job when his suit was torn. Why did he die three minutes later? -Riddles

Description : A man was just doing his job when his suit was torn. Why did he die three minutes later? -Riddles

Last Answer : He was an astronaut on a space walk, doing repairs.

Julie is going on an extended trip for three weeks. She lives in a remote area where there are frequent electrical power outages which can last up to three or four days. Julie has quite a bit of food in her freezer which would go bad if it thawed and then re-froze. She does have digital clock and a VCR which would flash 12:00 if the power went out. Unfortunately the clock and VCR flash even if the power only goes out for a few seconds. What can Julie do so that when she returns home she will be able to determine whether the power was out long enough to thaw her food? Asking a neighbor whether the power was out, isn't a reliable option because the nearest house is half a mile away, and one house may have power, while another house may have no power. She won?t be able to have a neighbor chec

Description : Julie is going on an extended trip for three weeks. She lives in a remote area where there are frequent electrical power outages which can last up to three or four days. Julie has quite a bit of food ... power, while another house may have no power. She won?t be able to have a neighbor chec -Riddles

Last Answer : One thing Julie could do is freeze a tray of ice-cubes, and turn the tray of ice upside down in her freezer. When she comes home, she should check the tray. If the ice cubes are still in the ... clean out the freezer. She will have to make a judgment call if the ice-cubes are only slightly thawed.

The marathon man timed himself and found out that if he wore a bright white outfit he ran 20 miles in 80 minutes, but when he wore a dark outfit, he ran 20 miles in one hour and twenty minutes. What does this mean for his next race? -Riddles

Description : The marathon man timed himself and found out that if he wore a bright white outfit he ran 20 miles in 80 minutes, but when he wore a dark outfit, he ran 20 miles in one hour and twenty minutes. What does this mean for his next race? -Riddles

Last Answer : Absolutely nothing, as 80 minutes equals an hour and twenty minutes.

Convex mirrors are used as a rear view mirror in motor cycles because (1) it forms real image (2) it forms erect (upright) image (3) it forms smaller image as compared with object (4) All of the above

Description : Convex mirrors are used as a rear view mirror in motor cycles because (1) it forms real image (2) it forms erect (upright) image (3) it forms smaller image as compared with object (4) All of the above

Last Answer : (3) it forms smaller image as compared with object Explanation: It is because image formed by an convex mirror is always virtual, erect and smaller than the object.

Convex mirrors are used as a rear view mirror in motor cycles because (1) it forms real image (2) it forms erect (upright) image (3) it forms smaller image as compared with object (4) All of the above

Description : Convex mirrors are used as a rear view mirror in motor cycles because (1) it forms real image (2) it forms erect (upright) image (3) it forms smaller image as compared with object (4) All of the above

Last Answer : it forms smaller image as compared with object

A man goes out drinking every night, returning to his home in the wee hours of every morning. No matter how much he drinks, he never gets a hangover. This drink is very well known, but is rarely consumed, served warm and taken straight from its source. The man is a sucker for a free drink, especially since he can't live without it.What is his favorite drink? -Riddles

Description : A man goes out drinking every night, returning to his home in the wee hours of every morning. No matter how much he drinks, he never gets a hangover. This drink is very well known, but is ... sucker for a free drink, especially since he can't live without it.What is his favorite drink? -Riddles

Last Answer : Blood. The man is a Vampire.

A man goes out drinking every night, returning to his home in the wee hours of every morning. No matter how much he drinks, he never gets a hangover. This drink is very well known, but is rarely consumed, served warm and taken straight from its source. The man is a sucker for a free drink, especially since he can't live without it. What is his favorite drink? -Riddles

Description : A man goes out drinking every night, returning to his home in the wee hours of every morning. No matter how much he drinks, he never gets a hangover. This drink is very well known, but is rarely ... for a free drink, especially since he can't live without it. What is his favorite drink? -Riddles

Last Answer : Blood, he's a vampire!

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.

A man wants to watch some TV, but the TV won't turn on with the remote. There's no power button on the TV, so he can't turn it on with the monitor. But 5 minutes later, he's happily watching TV. What happened and what did he do? -Riddles

Description : A man wants to watch some TV, but the TV won't turn on with the remote. There's no power button on the TV, so he can't turn it on with the monitor. But 5 minutes later, he's happily watching TV. What happened and what did he do? -Riddles

Last Answer : The TV was unplugged, so he plugged it back in.

Ravi walks to and fro to a Gym. He spends 30 minutes in gym. If he walks at speed of 20 km an hour, he returns to home at 8.00 a.m. If he walks at 30 km an hour, he returns to home at 7.30 a.m. How fast must he walk in order to return at 7.15 hours? a) 40 km/hr b) 30 km/hr c) 60 km/hr d) 50 km/hr

Description : Ravi walks to and fro to a Gym. He spends 30 minutes in gym. If he walks at speed of 20 km an hour, he returns to home at 8.00 a.m. If he walks at 30 km an hour, he returns to home at 7.30 a.m. How fast must he walk in order to return at 7.15 hours? a) 40 km/hr b) 30 km/hr c) 60 km/hr d) 50 km/hr

Last Answer :  A As per the question, let D be the total distance and ‘t’ is the time taken. So we have: D=20t 20t =30(t-0.5) 20t=30t-15 10t=15 t=3/2 D= 30 km Now, for the condition given we have: 30=S(t-3/4) 30=S(3/2-3/4) 30=S((6-3)/4) 30=S(3/4) S=40 km/hr

A duck arrives near a lake. He sees a sign were it is written 'No swimming allowed.', but the duck jumps into the water. Why? -Riddles

Description : A duck arrives near a lake. He sees a sign were it is written 'No swimming allowed.', but the duck jumps into the water. Why? -Riddles

Last Answer : Because ducks can't read.

A man has 3 wife's, each one has 3 houses, in one of houses for every wife his mother in law lives. He goes to first house with money, mother doubles it, he leaves half, he goes to second wife, mother doubles it again, he leaves the same amount as to first wife, he goes to third house and mother doubles it again, he leaves the same amount as to first one,but goes home with no money. How much money did he have? 2 wife are sister and they have a same mother? -Riddles

Description : A man has 3 wife's, each one has 3 houses, in one of houses for every wife his mother in law lives. He goes to first house with money, mother doubles it, he leaves half, he goes to second wife, ... with no money. How much money did he have? 2 wife are sister and they have a same mother? -Riddles

Last Answer : This answer was deleted by moderators

There once was an evil wizard. He took 3 woman from their homes and turned them into rose bushes that looked exactly alike. He put them in his garden. One of the woman had a husband and children and begged the wizard to let her see them. He agreed. At night, he brought the woman to her house. In the morning he came and took her home. One day the husband decided to go rescue her. So he snuck into the wizard's garden. He looked and looked at the 3 identical rose bushes trying to figure out which could be his wife. Suddenly, he knew the answer and he took his wife home. How did he know which rose bush was his wife? -Riddles

Description : There once was an evil wizard. He took 3 woman from their homes and turned them into rose bushes that looked exactly alike. He put them in his garden. One of the woman had a husband and children and ... the answer and he took his wife home. How did he know which rose bush was his wife? -Riddles

Last Answer : The wizard brought the rosebush to her home at night and returned her to the garden in the morning. Therefore, she was the only plant without dew.

John was very tired after a long day of work. He went to bed at 10 p.m., wound his alarm clock and set it for noon the next day. Since John fell asleep almost immediately, how many hours of sleep did he get before the alarm woke him? -Riddles

Description : John was very tired after a long day of work. He went to bed at 10 p.m., wound his alarm clock and set it for noon the next day. Since John fell asleep almost immediately, how many hours of sleep did he get before the alarm woke him? -Riddles

Last Answer : Two hours. Wind-up clocks can't be set more than 12 hours in advance.

A robber came into my store and stole $100 from the register without my knowledge. A few minutes later, the same guy came back with the $100 he stole and purchased $70 worth of items and I gave him $30 in change. How much money did I lose? -Riddles

Description : A robber came into my store and stole $100 from the register without my knowledge. A few minutes later, the same guy came back with the $100 he stole and purchased $70 worth of items and I gave him $30 in change. How much money did I lose? -Riddles

Last Answer : I lost $100

Is anyone else annoyed CBS does not just go ahead and schedule 60 minutes a half an hour later?

Description : Is anyone else annoyed CBS does not just go ahead and schedule 60 minutes a half an hour later?

Last Answer : I recommend just showing historical Packers highlights and great moments until the hour.

Old Mr. Tilly was found dead in his study by Mr. Foster. Mr. Foster recounted his dismal discovery to the police. 'I was walking by Mr. Tilly`s house when I thought I would just pop in for a visit. I noticed his study light was on and I decided to peek in from the outside to see if he was in there. There was frost on the window, so I had to wipe it away to see inside. That is when I saw his body. So I kicked in the front door to confirm my suspicions of foul play. I called the police immediately afterward.' The officer immediately arrested Mr. Foster for the murder of Mr. Tilly. How did he know Mr. Foster was lying? -Riddles

Description : Old Mr. Tilly was found dead in his study by Mr. Foster. Mr. Foster recounted his dismal discovery to the police. 'I was walking by Mr. Tilly`s house when I thought I would just pop in for a ... arrested Mr. Foster for the murder of Mr. Tilly. How did he know Mr. Foster was lying? -Riddles

Last Answer : Frost forms on the inside of the window, not the outside. So Mr. Foster could not have wiped it off to discover Mr. Tilly`s body.

Four years ago, the average of a 4 member family was 40 years. 3 years ago, a boy got married to a 23 years old girl, and they had a baby boy last year. what is the average of the family 2 years from now assuming no one joins or leaves from the family in the next 2 years.

Description : Four years ago, the average of a 4 member family was 40 years. 3 years ago, a boy got married to a 23 years old girl, and they had a baby boy last year. what is the average of the family 2 years from now assuming no ... leaves from the family in the next 2 years. a) 40 b) 42.5 c) 36.5 d) 34 e) 35.8

Last Answer : Four years ago, sum of all the family members age = 4× 40 = 160 three years ago, sum of all the family members age = 164 + 23 = 187 last year, sum = 197 (187 + 5 + 5) two years from now, sum = 197 + 18 = 215 hence, average = 215/6 = 35.8 Answer: e)

Not far outside the town of Pottsville, a railroad track runs through a tunnel in a hillside. There’s only one track, and the tunnel is wide enough for only one train. But one day, two trains went into the tunnel from opposite directions. Each train entered the tunnel exactly at eight o’clock. Three minutes later, each train came out at the opposite ends of the tunnel. Yet, there was no collision! How was this possible? -Riddles

Description : Not far outside the town of Pottsville, a railroad track runs through a tunnel in a hillside. There's only one track, and the tunnel is wide enough for only one train. But one day, two trains ... out at the opposite ends of the tunnel. Yet, there was no collision! How was this possible? -Riddles

Last Answer : One train comes at 8am and the other train came at 8pm.

A woman shoots her husband. Then she holds him under water for over 5 minutes. Finally, she hangs him. But 5 minutes later they both go out together and enjoy a wonderful dinner together.How can this be? -Riddles

Description : A woman shoots her husband. Then she holds him under water for over 5 minutes. Finally, she hangs him. But 5 minutes later they both go out together and enjoy a wonderful dinner together.How can this be? -Riddles

Last Answer : The woman was a photographer. She shot a picture of her husband, developed it, and hung it up to dry.

A woman shoots her husband. Then she holds him under water for over 5 minutes. Finally, she hangs him. But 5 minutes later they both go out together and enjoy a wonderful dinner together. How can this be? -Riddles

Description : A woman shoots her husband. Then she holds him under water for over 5 minutes. Finally, she hangs him. But 5 minutes later they both go out together and enjoy a wonderful dinner together. How can this be? -Riddles

Last Answer : The woman was a photographer. She shot a picture of her husband, developed it, and hung it up to dry.

A woman shoots her husband. Then she holds him underwater for over 5 minutes. Finally, she hangs him. But 5 minutes later they both go out together and enjoy a wonderful dinner together. How can this be? -Riddles

Description : A woman shoots her husband. Then she holds him underwater for over 5 minutes. Finally, she hangs him. But 5 minutes later they both go out together and enjoy a wonderful dinner together. How can this be? -Riddles

Last Answer : The woman was a photographer. She shot a picture of her husband, developed it, and hung it up to dry.

A man decides to buy a nice horse. He pays $600 for it, and he is very content with this strong animal. After a year, the value of the horse has increased to $700 and he decides to sell the horse. But already a few days later he regrets his decision to sell the beautiful horse, and he buys it again. Unfortunately he has to pay $800 to get it back, so he loses $100. After another year of owning the horse, he finally decides to sell the horse for $900. What is the overall profit the man makes? -Riddles

Description : A man decides to buy a nice horse. He pays $600 for it, and he is very content with this strong animal. After a year, the value of the horse has increased to $700 and he decides to sell the ... horse, he finally decides to sell the horse for $900. What is the overall profit the man makes? -Riddles

Last Answer : The man makes an overall profit of $200.

My only timepiece is a wall clock. One day I forgot to wind it and it stopped. I went to visit a friend whos watch is always correct, stayed awhile, and then went home. There I made a simple calculation and set the clock right.How did I do this even though I had no watch on me to tell how long it took me to return from my friend's house? -Riddles

Description : My only timepiece is a wall clock. One day I forgot to wind it and it stopped. I went to visit a friend whos watch is always correct, stayed awhile, and then went home. There I made a simple calculation ... I had no watch on me to tell how long it took me to return from my friend's house? -Riddles

Last Answer : Before I left, I wound the wall clock. When I returned, the change in time equaled how long it took to go to my friends house and return, plus the time I spent there. But I knew the latter because I ... I added this time to what my friend watch showed when I left, and set the sum on my wall clock.

A dentist concave mirror has a radius of curvature of `30 cm`. How far must it be placed from a small cavity in order to get a virtual image magnified

Description : A dentist concave mirror has a radius of curvature of `30 cm`. How far must it be placed from a small cavity in order to get a virtual image magnified

Last Answer : A dentist concave mirror has a radius of curvature of `30 cm`. How far must it be placed from a ... order to get a virtual image magnified `5` times ?

In order to form an image as seen in a mirror in what order must light rays reflect?

Description : In order to form an image as seen in a mirror in what order must light rays reflect?

Last Answer : hvjvbjb

At what distance must an object be placed from mirror in order that a real image double its size may be obtained? (a) -24 cm (b) 32 cm (c) -40 cm (d) 45 cm

Description : At what distance must an object be placed from mirror in order that a real image double its size may be obtained? (a) -24 cm (b) 32 cm (c) -40 cm (d) 45 cm

Last Answer : (a) -24 cm

A boy is standing in front of a plane mirror at a distance of 3 m from it. What is the distance between the boy and his image? (1) 3 m (2) 6 m (3) 4.5 m (4) None of these

Description : A boy is standing in front of a plane mirror at a distance of 3 m from it. What is the distance between the boy and his image? (1) 3 m (2) 6 m (3) 4.5 m (4) None of these

Last Answer : (2) 6 m Explanation: The image formed by a plane mirror is always virtual upright, and of the same shape and size as the object it is reflecting. A virtual image is a copy of an object formed at the location from which the light rays appear to come

How many minutes from twenty to twelve until half past 12?

Description : How many minutes from twenty to twelve until half past 12?

Last Answer : 50 minutes in total.

How many minutes from twenty to twelve until half past 122?

Description : How many minutes from twenty to twelve until half past 122?

Last Answer : The answer depends on what you intended by "half past 122".

How long could the narrator‘s aeroplane fly before the other plane started going down? a) Half an hour b) Fifteen to twenty minutes c) An hour d) Five to ten minutes

Description : How long could the narrator‘s aeroplane fly before the other plane started going down? a) Half an hour b) Fifteen to twenty minutes c) An hour d) Five to ten minutes

Last Answer : d) Five to ten minutes

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'.