You are standing in front of a room with one lightbulb inside of it. You cannot see if it is on or off. Outside the room, there are 3 switches in the off positions. You may turn the switches any way you want to. You stop turning the switches, enter the room and know which switch controls the lightbulb. How? -Riddles

You are standing in front of a room with one lightbulb inside of it. You cannot see if it is on or off. Outside the room, there are 3 switches in the off positions. You may turn the switches any way you want to. You stop turning the switches, enter the room and know which switch controls the lightbulb. How? -Riddles
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1 Answer

Answer :

You turn 2 switches 'on' and leave 1 switch 'off' and wait about a minute. Then enter the room, but just before you enter, turn one switch from 'on' to 'off'. Once in the room, feel the lightbulb - if it is warm, but off, it has to be the last switch you turned off. If it is on, it has to be the switch left on. If it is cold and is off, it has to be the switch you left in the off position.
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Related questions

there are 3 light bulbs in three seperate rooms. in front of you, there is a panel with 3 seperate switches. they only turn on or off. you may look inside each room only once. how can you tell which bulb belongs to which switch? -Riddles

Description : there are 3 light bulbs in three seperate rooms. in front of you, there is a panel with 3 seperate switches. they only turn on or off. you may look inside each room only once. how can you tell which bulb belongs to which switch? -Riddles

Last Answer : you turn on any two switches, leave them for a few minutes, and turn one off. you enter each room only once. you know that the lightbulb that is lit beongs to the switch that was left on, the ... hot, belongs to the switch you turned off, and the cold bulb belongs to the switch you never touched.

There are 100 light bulbs lined up in a row in a long room. Each bulb has its own switch and is currently switched off. The room has an entry door and an exit door. There are 100 people lined up outside the entry door. Each bulb is numbered consecutively from 1 to 100. So is each person. Person No. 1 enters the room, switches on every bulb, and exits. Person No. 2 enters and flips the switch on every second bulb (turning off bulbs 2, 4, 6, ...). Person No. 3 enters and flips the switch on every third bulb (changing the state on bulbs 3, 6, 9, ...). This continues until all 100 people have passed through the room. What is the final state of bulb No. 64? And how many of the light bulbs are illuminated after the 100th person has passed through the room? -Riddles

Description : There are 100 light bulbs lined up in a row in a long room. Each bulb has its own switch and is currently switched off. The room has an entry door and an exit door. There are 100 people ... And how many of the light bulbs are illuminated after the 100th person has passed through the room? -Riddles

Last Answer : First think who will operate each bulb, obviously person #2 will do all the even numbers, and say person #10 will operate all the bulbs that end in a zero. So who would operate for example bulb 48: Persons numbered: 1 & 48 ... 100 (1, 4, 9, 16, 25, 36, 49, 64, 81 & 100) hence 10 bulbs remain on.

There is a lamp inside a photography darkroom. When the darkroom door is closed, it is impossible to tell from outside the room whether or not the lamp is on. There are two switches outside the door of the darkroom. One or both of the switches may control the lamp. It also could be that neither of the switches control the lamp. All you know is that the light bulb is currently off and that the lamp and bulb are in working condition. The darkroom door is closed and once you open the door you cannot touch either of the switches. If you can only open the dark-room door one time, how can you tell which switches, if any, control the lamp? -Riddles

Description : There is a lamp inside a photography darkroom. When the darkroom door is closed, it is impossible to tell from outside the room whether or not the lamp is on. There are two switches outside the door of ... dark-room door one time, how can you tell which switches, if any, control the lamp? -Riddles

Last Answer : Turn the first switch on and leave it on for ten minutes. After ten minutes, turn that switch off and turn the second switch on. Open the darkroom door, and lightly (in case it is hot) touch the ... one controls the lamp. If the lamp is off, and the bulb is cool, neither switch controls the lamp.

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.

I have keys but no locks, I have space but no room, U can enter but you can't go outside. What Am I? -Riddles

Description : I have keys but no locks, I have space but no room, U can enter but you can't go outside. What Am I? -Riddles

Last Answer : A Keyboard.

There was a man driving a truck. There was a woman standing in front of the truck. The truck had no lights on and the moon was not up. How did the man see the woman? -Riddles

Description : There was a man driving a truck. There was a woman standing in front of the truck. The truck had no lights on and the moon was not up. How did the man see the woman? -Riddles

Last Answer : It was daytime.

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I? -Riddles

Description : I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I? -Riddles

Last Answer : Mushroom.

Moisture damage, as a result of condensation occurring inside of the cargo winch master switches, can be reduced by __________________. A. installing a light bulb in the pedestal stand B. coating the switch box internals with epoxy sealer C. venting the switch box regularly D. using strip heaters inside the switch box

Description : Moisture damage, as a result of condensation occurring inside of the cargo winch master switches, can be reduced by __________________. A. installing a light bulb in the pedestal stand B. coating the ... epoxy sealer C. venting the switch box regularly D. using strip heaters inside the switch box

Last Answer : Answer: D

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.

Positive control of induction is best described as a control system in which an operon functions (A) Unless it is switched off by a derepressed repressor protein (B) Only after a repressor protein is inactivated by an inducer (C) Only after an inducer protein, which can be inactivated by a corepressor, switches it on (D) Only after an inducer protein, which is activated by an inducer, switch it on

Description : Positive control of induction is best described as a control system in which an operon functions (A) Unless it is switched off by a derepressed repressor protein (B) Only after a repressor protein is ... on (D) Only after an inducer protein, which is activated by an inducer, switch it on

Last Answer : Answer : D

When the master switch for the winch shown in the illustration is in the 'off' position, and the line & safe switches are closed, which of the listed relays should be energized? EL-0102 A. 'DB' & '2T' B. 'DB' & '4M' C. 'FR-B.O.' & 'LV' D. '1M' & '1A'

Description : When the master switch for the winch shown in the illustration is in the 'off' position, and the line & safe switches are closed, which of the listed relays should be energized? EL-0102 A. 'DB' & '2T' B. 'DB' & '4M' C. 'FR-B.O.' & 'LV' D. '1M' & '1A'

Last Answer : Answer: C

The winch shown in the illustration operates in any of the positions with the master switch in the 'lower' direction, but will not 'hoist' in any of the master switch hoist positions. Which of the listed faults could be the cause? EL-0102 A. Master switch contact 'MS3' may have defective springs. B. Contactor '3M' coil could have an open winding. C. Contact '2M' in the power circuit may be badly corroded. D. Series relay 'FR' may be open.

Description : The winch shown in the illustration operates in any of the positions with the master switch in the 'lower' direction, but will not 'hoist' in any of the master switch hoist positions. Which of the listed faults ... '2M' in the power circuit may be badly corroded. D. Series relay 'FR' may be open.

Last Answer : Answer: A

Nothing on the outside Nothing on the inside Light as a feather Yet ten men cannot lift it.What is it? -Riddles

Description : Nothing on the outside Nothing on the inside Light as a feather Yet ten men cannot lift it.What is it? -Riddles

Last Answer : A bubble.

Which of the following conditions does not hold good for a solution to a critical section problem ? (A) No assumptions may be made about speeds or the number of CPUs. (B) No two processes may be simultaneously inside their critical sections. (C) Processes running outside its critical section may block other processes. (D) Processes do not wait forever to enter its critical section.

Description : Which of the following conditions does not hold good for a solution to a critical section problem ? (A) No assumptions may be made about speeds or the number of CPUs. (B) No two processes ... critical section may block other processes. (D) Processes do not wait forever to enter its critical section.

Last Answer : (C) Processes running outside its critical section may block other processes. 

You don't always see me, but I am always there. Not always where you are, but always somewhere. You cannot see through the opposite of me, but I will always be a help for you to see. I'm at the end of where cars go through. Flip a switch and I'm there for you. What am I? -Riddles

Description : You don't always see me, but I am always there. Not always where you are, but always somewhere. You cannot see through the opposite of me, but I will always be a help for you to see. I'm at the end of where cars go through. Flip a switch and I'm there for you. What am I? -Riddles

Last Answer : Light. Explanation: Somewhere in the world, there is always daylight. You can't see through darkness, which is the opposite of light. It is easier to see through light. There is always light at the end of a tunnel. Flip a light switch and light is there. I hope you enjoyed this riddle!

A man strolls into a hospital emergency room where there is a long line up to the reception desk. He walks right to the front and clamly asks to see the consultant in charge. No one gets angry and the receptionist immediately phones. The consultant has never met this man, yet she hurries away from the ward to see him.Why? -Riddles

Description : A man strolls into a hospital emergency room where there is a long line up to the reception desk. He walks right to the front and clamly asks to see the consultant in charge. No one gets angry and ... The consultant has never met this man, yet she hurries away from the ward to see him.Why? -Riddles

Last Answer : The man is a florist delievering a bouquet of flowers for the consultant.

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it? -Riddles

Description : There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it? -Riddles

Last Answer : Place the apple on one person's head.

A traveler, on his way to Miami, reaches a road junction, where he can turn left or right. He knows that only one of the two roads leads to Miami, but unfortunately, he does not know which one. Fortunately, he sees two twin-brothers standing at the road junction, and he decides to ask them for directions. The traveler knows that one of the two brothers always tells the truth and the other one always lies. Unfortunately, he does not know which one always tells the truth and which one always lies. How can the traveler find out the way to Miami by asking just one question to one of the two brothers? -Riddles

Description : A traveler, on his way to Miami, reaches a road junction, where he can turn left or right. He knows that only one of the two roads leads to Miami, but unfortunately, he does not know which one ... the traveler find out the way to Miami by asking just one question to one of the two brothers? -Riddles

Last Answer : The question that the traveler should ask is: 'Does the left road lead to Miami according to your brother?' If the answer is 'Yes', the traveler should turn right, and if the answer is 'No', the traveler should turn left.

Are voice command/wifi type switches and controls designed for singles?

Description : Are voice command/wifi type switches and controls designed for singles?

Last Answer : I agree that robot vacuums sometimes turn on for no good reason, but Alexa has a whisper mode that works really well.

If you get an opportunity to teach a visually challenged student along with normal students, what type of treatment would you like to give him in the class ? (A) Not giving extra attention because majority may suffer. (B) Take care of him sympathetically in the class- room. (C) You will think that blindness is his destiny and hence you cannot do anything. (D) Arrange a seat in the front row and try to teach at a pace convenient to him.

Description : If you get an opportunity to teach a visually challenged student along with normal students, what type of treatment would you like to give him in the class ? (A) Not giving extra attention because majority may ... (D) Arrange a seat in the front row and try to teach at a pace convenient to him.

Last Answer : (D) Arrange a seat in the front row and try to teach at a pace convenient to him.

A group of soldiers were standing in the blistering sun facing due west. Their sergeant shouted at them: Right turn! About turn! Left turn! In which direction are they now facing? -Riddles

Description : A group of soldiers were standing in the blistering sun facing due west. Their sergeant shouted at them: Right turn! About turn! Left turn! In which direction are they now facing? -Riddles

Last Answer : East. A right turn is 90 degrees, an about turn is 180 degrees, and a left turn is also 90 degrees. Therefore, the soldiers are now facing east.

A group of privates were standing in the blistering sun facing due west. Their sergeant shouted at them: Right turn! About turn! Left turn!In which direction are they now facing? -Riddles

Description : A group of privates were standing in the blistering sun facing due west. Their sergeant shouted at them: Right turn! About turn! Left turn!In which direction are they now facing? -Riddles

Last Answer : East.

An auditor is required to obtain a basic understanding of the client's internal control to plan the audit. The auditor may then decide to perform tests of controls on alinternal control procedures a. That would aid in preventing fraud. b. Documented in the flowchart. c. Considered to be weaknesses that might allow errors to enter the accounting system. d. Considered to be strengths for which the auditor desires further reduction in the assessed level of control risk.l

Description : An auditor is required to obtain a basic understanding of the client's internal control to plan the audit. The auditor may then decide to perform tests of controls on all internal control ... to be strengths for which the auditor desires further reduction in the assessed level of control risk.

Last Answer : Considered to be strengths for which the auditor desires further reduction in the assessed level of control risk.

You are stuck in a room. On the door is a keypad with all the letters of the alphabet and the enter button. The word is 7 letters long. To your left, is a table with a note. The note reads: Sulfer Carbon Iodine Einsteinium Nitrogen Cerium On the other side of the room is a billboard. On the billboard there is a note pinned to it. On this note, it says: After solving the note upon the table, remove a letter and you will be free.” What is the code to escape? -Riddles

Description : You are stuck in a room. On the door is a keypad with all the letters of the alphabet and the enter button. The word is 7 letters long. To your left, is a table with a note. The note reads: ... the note upon the table, remove a letter and you will be free. What is the code to escape? -Riddles

Last Answer : The code is science After solving for the first note, you will get sciesnce. If you don't understand why, go to the Periodic Table of the Elements and find these elements there. From the ... with this my self when I was looking at the periodic table. Thank you for reading my Escape Room.

I am the type of room you can not enter or leave. Raise from the ground below, I could be poisonous or a delicious treat. What am I? -Riddles

Description : I am the type of room you can not enter or leave. Raise from the ground below, I could be poisonous or a delicious treat. What am I? -Riddles

Last Answer : A Mushroom.

I have many keys, but no lock. I have space, but no room. I can enter, but I can't exit. What am I? -Riddles

Description : I have many keys, but no lock. I have space, but no room. I can enter, but I can't exit. What am I? -Riddles

Last Answer : A keyboard.

What has keys but no locks, space but no room and you can enter but you can't go in side? -Riddles

Description : What has keys but no locks, space but no room and you can enter but you can't go in side? -Riddles

Last Answer : A keyboard.

What room can you never enter? -Riddles

Description : What room can you never enter? -Riddles

Last Answer : A mushroom.

What room you can not enter? ( literally ) -Riddles

Description : What room you can not enter? ( literally ) -Riddles

Last Answer : Mushroom.

What room can no one enter? -Riddles

Description : What room can no one enter? -Riddles

Last Answer : A Mushroom.

What room can no one enter? -Riddles

Description : What room can no one enter? -Riddles

Last Answer : A mushroom.

I have keys that open no locks, I have space, but there is no room, You can enter, but you can't go in.What am I? -Riddles

Description : I have keys that open no locks, I have space, but there is no room, You can enter, but you can't go in.What am I? -Riddles

Last Answer : A computer keyboard, or typewriter.

What object has keys that open no locks, space but no room, and you can enter but not go in? -Riddles

Description : What object has keys that open no locks, space but no room, and you can enter but not go in? -Riddles

Last Answer : A computer keyboard.

Which of the devices shown in the illustration automatically prevents the simultaneous operation of the windlass from both master switches? EL-0073 A. Selector switch B. Contact 'CR1a' C. Contact 'CR2a' D. Contact 'CR1D'

Description : Which of the devices shown in the illustration automatically prevents the simultaneous operation of the windlass from both master switches? EL-0073 A. Selector switch B. Contact 'CR1a' C. Contact 'CR2a' D. Contact 'CR1D'

Last Answer : Answer: D

As part of a routine maintenance program for deck machinery, you should ___________. A. inspect electrical wiring and pushbutton switches for evidence of corrosion or burned insulation B. disassemble pushbutton switches and drain water each week C. remove motor covers and ventilate as weather permits D. Check drum switch contact pressure every three months

Description : As part of a routine maintenance program for deck machinery, you should ___________. A. inspect electrical wiring and pushbutton switches for evidence of corrosion or burned insulation B. disassemble ... covers and ventilate as weather permits D. Check drum switch contact pressure every three months

Last Answer : Answer: A

A ________ switch combines crossbar switches inseveral (normally three) stages. A) multistage B) multiple crossbar C) multiple path D) none of the above

Description : A ________ switch combines crossbar switches inseveral (normally three) stages. A) multistage B) multiple crossbar C) multiple path D) none of the above

Last Answer : multistag

What is the difference between a switch and a hub? A. Switches operate at physical layer while hubs operate at data link layerB. Switches operate at data link layer while hubs operate at transport layer C. Switches operate at data link layer while hubs operate at physical layer D. Switches operate at transport layer while hubs operate at physical layer

Description : What is the difference between a switch and a hub? A. Switches operate at physical layer while hubs operate at data link layer B. Switches operate at data link layer while hubs operate at ... hubs operate at physical layer D. Switches operate at transport layer while hubs operate at physical layer

Last Answer : C. Switches operate at data link layer while hubs operate at physical layer

What is the difference between a switch and a hub? A. Switches operate at physical layer while hubs operate at data link layer B. Switches operate at data link layer while hubs operate at transport layer C. Switches operate at data link layer while hubs operate at physical layer D. Switches operate at transport layer while hubs operate at physical layer

Description : What is the difference between a switch and a hub? A. Switches operate at physical layer while hubs operate at data link layer B. Switches operate at data link layer while hubs operate at ... hubs operate at physical layer D. Switches operate at transport layer while hubs operate at physical layer

Last Answer : C. Switches operate at data link layer while hubs operate at physical layer

Which of the following statements accurately describe the differences between a hub and a switch? Check all that apply. A. A switch remembers which devices are connected on each interface, while a hub does not. B. A hub is a physical layer device, and a switch is a data link layer device. C. A hub causes larger collision domains. D. Hubs are more sophisticated versions of switches. a. A,B b. A,B,C c. A,B,C,D d. A,C,D

Description : Which of the following statements accurately describe the differences between a hub and a switch? Check all that apply. A. A switch remembers which devices are connected on each interface, while a hub does not. B. A hub is a ... versions of switches. a. A,B b. A,B,C c. A,B,C,D d. A,C,D

Last Answer : b. A,B,C

The______electro mechanical switch (developed in 1938) had fewer moving parts than earlier switches. (A) No. 1ESS (B) Strowger (C) Step-by-step (D) Crossbar

Description : The______electro mechanical switch (developed in 1938) had fewer moving parts than earlier switches. (A) No. 1ESS (B) Strowger (C) Step-by-step (D) Crossbar

Last Answer : (D) Crossbar

The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to (a) lubricate the contacts (b) insulate the contacts from switch body (c) extinguish the arc (d) all of the above (e) none of the above

Description : The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to (a) lubricate the contacts (b) insulate the contacts from switch body (c) extinguish the arc (d) all of the above (e) none of the above

Last Answer : (c) extinguish the arc

Consider three CPU intensive processes P1, P2, P3 which require 20, 10 and 30 units of time, arrive at times 1, 3 and 7 respectively. Suppose operating system is implementing Shortest Remaining Time first (preemptive scheduling) algorithm, then .............. context switches are required (suppose context switch at the beginning of Ready queue and at the end of Ready queue are not counted). (A) 3 (B) 2 (C) 4 (D) 5

Description : Consider three CPU intensive processes P1, P2, P3 which require 20, 10 and 30 units of time, arrive at times 1, 3 and 7 respectively. Suppose operating system is implementing Shortest Remaining Time first (preemptive scheduling) ... end of Ready queue are not counted). (A) 3 (B) 2 (C) 4 (D) 5

Last Answer : (A) 3

A bulb in a staircase has two switches, one switch being at the ground floor and the other one at the first

Description : A bulb in a staircase has two switches, one switch being at the ground floor and the other one at the first floor. The bulb can be turned ON and also can be turned OFF by any one of the switches irrespective of the ... bulb resembles  (A) and AND gate (B) an OR gate (C) an XOR gate (D) a NAND gate

Last Answer : A bulb in a staircase has two switches, one switch being at the ground floor and the other one at the first floor. The bulb can be turned ON and also can be turned OFF by any one of the switches irrespective of the state of the other switch. The logic of switching of the bulb resembles an XOR gate

Every year, sometimes during winter and sometimes in the springtime, an elderly woman takes 12 pieces of food, each in its own separate colorful container, and strategically places them outside in her front and back yards. The woman then challenges select relatives to go retrieve the 12 pieces of food for her, so she can put them back into her refrigerator to be eaten later. When these select relatives ask her how the 12 pieces of food ended up outside in her yards, the elderly woman totally denies having put them there. Instead, ----- she blames an animal for the entire affair! Is this woman slip-sliding away mentally, or is there some method to her madness ----- and what animal does she blame? -Riddles

Description : Every year, sometimes during winter and sometimes in the springtime, an elderly woman takes 12 pieces of food, each in its own separate colorful container, and strategically places them outside in her front and ... is there some method to her madness ----- and what animal does she blame? -Riddles

Last Answer : The elderly woman has many grandchildren who she invites to her house each year to her annual Easter egg hunt! She challenges them to find the 12 colorful eggs the Easter Bunny has hidden for them.

A 'dead front' switchboard is one _____________. A. without switches on it B. with insulated switches and no exposed terminals C. without circuit breakers D. without safety hand rails nor rubber mats

Description : A 'dead front' switchboard is one _____________. A. without switches on it B. with insulated switches and no exposed terminals C. without circuit breakers D. without safety hand rails nor rubber mats

Last Answer : Answer: B

How often should you switch positions when doing CPR?

Description : How often should you switch positions when doing CPR?

Last Answer : What is the answer ?

In describing a switch by the number of positions of the actuator, what are the two possible configurations for a single pole, double-throw switch?

Description : In describing a switch by the number of positions of the actuator, what are the two possible configurations for a single pole, double-throw switch?

Last Answer : Two-position and three-position.