CSEMARTIN Posted May 22, 2019 Share Posted May 22, 2019 Inside of a closed room there are three light bulbs. On the outside of the room there are three light switches. Each switch turns on one light bulb. You can only enter the room once. You can't see inside the room, and you can't use any tricks or mirrors. There is nothing else inside the room. You can't use your camera or your phone. Nobody else can help you. How do you figure out which light switch turns on each light bulb? Link to comment Share on other sites More sharing options...
dkleskiw Posted May 22, 2019 Share Posted May 22, 2019 (edited) Turn a light on for a few minutes to get it hot and turn it off. Turn one light on and then enter the room. Touch the 'off' bulbs to find the hot one and you'll know which switch goes to what. To keep the answer hidden I made the text white. Highlight the above to see my answer. Edited May 22, 2019 by dkleskiw Link to comment Share on other sites More sharing options...
Lastcat Posted May 22, 2019 Share Posted May 22, 2019 (edited) I didn't look at the answer. Here's a guess. Which I also hid. I would turn on 2 switches. Turn off 1 after 3-5 mins. Then enter room with 1 switch still on and the remaining 2 off. Feel the other 2 bulbs that are off for heat. Done. Edited May 22, 2019 by Lastcat Link to comment Share on other sites More sharing options...
CSEMARTIN Posted May 22, 2019 Author Share Posted May 22, 2019 You guys made that look easy. Link to comment Share on other sites More sharing options...
Dranoel Posted May 22, 2019 Share Posted May 22, 2019 It was. I figured that one out 15 yrs ago. Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted May 23, 2019 Share Posted May 23, 2019 Great puzzle - I never would have figured that out. Link to comment Share on other sites More sharing options...
Ken6PPC Posted May 23, 2019 Share Posted May 23, 2019 OK, suppose the lights are LED's? Link to comment Share on other sites More sharing options...
Lastcat Posted May 23, 2019 Share Posted May 23, 2019 1 hour ago, Hi-Power Jack said: Great puzzle - I never would have figured that out. Was a great puzzle, CSCMartin send more. Link to comment Share on other sites More sharing options...
Lastcat Posted May 23, 2019 Share Posted May 23, 2019 (edited) 4 criminals are caught and are to be punished. The Judge allows them to be freed if they can solve a puzzle. If they do not, they will be hung. They agreed. The 4 criminals are lined up on some steps (shown in picture attached). They are all facing in the same direction. A wall separates the fourth man from the other three. So to summarize:- Man 1 can see men 2 and 3. Man 2 can see man 3. Man 3 can see none of the others. Man 4 can see none of the others. The criminals are wearing hats. They are told that there are two white hats and two black hats. The men initially don't know what color hat they are wearing. They are told to shout out the color of the hat that they are wearing as soon as they know for certain what color it is. They are not allowed to turn round or move. They are not allowed to talk to each other. They are not allowed to take their hats off. Who is the first person to shout out and why? Answer in white, highlight for results: Man 3 and man 4 can’t see anyone.Man 1 can see a white and a black hat so he knows that he has two possibilities: he either has a white or a black hat.Man 2 can see that man 3 has a black hat. And he knows that it would be obvious to man 1 that he is wearing a white hat if he had a black hat. In that case, man 1 would have already shouted. Man 2 concluded that he is wearing a white hat because there were no other options. Edited May 23, 2019 by Lastcat Link to comment Share on other sites More sharing options...
Lastcat Posted May 23, 2019 Share Posted May 23, 2019 A farmer has 12 chickens, all but 8 died, how many survived? Answer highlighted below. 8 Link to comment Share on other sites More sharing options...
CSEMARTIN Posted May 23, 2019 Author Share Posted May 23, 2019 2 hours ago, Ken6PPC said: OK, suppose the lights are LED's? Turn one on and come back in 50,000 hours after it has burned out. Link to comment Share on other sites More sharing options...
CSEMARTIN Posted May 23, 2019 Author Share Posted May 23, 2019 38 minutes ago, Lastcat said: 4 criminals are caught and are to be punished. The Judge allows them to be freed if they can solve a puzzle. If they do not, they will be hung. They agreed. The 4 criminals are lined up on some steps (shown in picture attached). They are all facing in the same direction. A wall separates the fourth man from the other three. So to summarize:- Man 1 can see men 2 and 3. Man 2 can see man 3. Man 3 can see none of the others. Man 4 can see none of the others. The criminals are wearing hats. They are told that there are two white hats and two black hats. The men initially don't know what color hat they are wearing. They are told to shout out the color of the hat that they are wearing as soon as they know for certain what color it is. They are not allowed to turn round or move. They are not allowed to talk to each other. They are not allowed to take their hats off. Who is the first person to shout out and why? Answer in white, highlight for results: Man 3 and man 4 can’t see anyone.Man 1 can see a white and a black hat so he knows that he has two possibilities: he either has a white or a black hat.Man 2 can see that man 3 has a black hat. And he knows that it would be obvious to man 1 that he is wearing a white hat if he had a black hat. In that case, man 1 would have already shouted. Man 2 concluded that he is wearing a white hat because there were no other options. Very cool puzzle. I gave up and had to look at the answer. Link to comment Share on other sites More sharing options...
Lastcat Posted May 23, 2019 Share Posted May 23, 2019 (edited) 31 minutes ago, CSEMARTIN said: Very cool puzzle. I gave up and had to look at the answer. Ha, truthfully, I did too when I saw it a month ago. #4 is irrelevant, so #2 has to wait on #1. If #1 can't answer, then #1 see's a white and black hat, So #2 calls out white. But if #1 saw 2 black hats, he could call out White, since he see's both hats, but the colors he see's are different, so he is not sure. Edited May 23, 2019 by Lastcat Link to comment Share on other sites More sharing options...
Lastcat Posted May 23, 2019 Share Posted May 23, 2019 32 minutes ago, CSEMARTIN said: Turn one on and come back in 50,000 hours after it has burned out. But..but...tapping bulbs could get you 1 switch, how about the other 2? Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted May 23, 2019 Share Posted May 23, 2019 6 hours ago, CSEMARTIN said: Very cool puzzle. I gave up and had to look at the answer. Me too. Link to comment Share on other sites More sharing options...
CSEMARTIN Posted May 23, 2019 Author Share Posted May 23, 2019 7 hours ago, Lastcat said: But..but...tapping bulbs could get you 1 switch, how about the other 2? My thinking was the burned out LED would look different than the other two bulbs. Burn one out, flip another switch, walk in the room, exam the two bulbs that are out and you can figure out which switch operates which bulb. If a burned out LED is indistinguishable from the others, this strategy won't work. Link to comment Share on other sites More sharing options...
CSEMARTIN Posted May 23, 2019 Author Share Posted May 23, 2019 Here is another one. It was in one of the Die Hard movies. You have a 5 gallon bucket, a 3 gallon bucket and a water source. How do you get 4 gallons without using anything but the 5 and 3 gallon bucket? There are two answers to this puzzle. Highlight below to see the answers: Answer #1: Fill the 5 gallon bucket. Pour the 5 gallon bucket into the 3 gallon bucket. Now there are 2 gallons left in the 5 gallon bucket. Empty the 3 gallon bucket and pour the 2 gallons from the 5 gallon bucket into the emptied 3 gallon bucket. Fill the 5 gallon bucket again and pour off one gallon into the 3 gallon bucket that has 2 gallons in it. Answer #2: Fill the 3 gallon bucket. Pour 3 gallons of water into the 5 gallon bucket. Fill up the 3 gallon bucket again and fill the remainder of the 5 gallon bucket. Now there will be one gallon left in the 3 gallon bucket. Empty the 5 gallon bucket and pour the one gallon of water that is in the 3 gallon bucket into the 5 gallon bucket. Fill the 3 gallon bucket and pour into the 5 gallon bucket with one gallon in it. Link to comment Share on other sites More sharing options...
BritinUSA Posted May 23, 2019 Share Posted May 23, 2019 Fill the 5G and pour into the 3G until 3G is full, two gallons left in 5G Empty the 3G Pour 5G into 3G, 3G now holds 2 gallons Fill 5G Pour 5G into 3G until full 5G now holds 4 gallons Link to comment Share on other sites More sharing options...
Dranoel Posted May 23, 2019 Share Posted May 23, 2019 5 hours ago, CSEMARTIN said: Here is another one. It was in one of the Die Hard movies. You have a 5 gallon bucket, a 3 gallon bucket and a water source. How do you get 4 gallons without using anything but the 5 and 3 gallon bucket? There are two answers to this puzzle. Highlight below to see the answers: Answer #1: Fill the 5 gallon bucket. Pour the 5 gallon bucket into the 3 gallon bucket. Now there are 2 gallons left in the 5 gallon bucket. Empty the 3 gallon bucket and pour the 2 gallons from the 5 gallon bucket into the emptied 3 gallon bucket. Fill the 5 gallon bucket again and pour off one gallon into the 3 gallon bucket that has 2 gallons in it. Answer #2: Fill the 3 gallon bucket. Pour 3 gallons of water into the 5 gallon bucket. Fill up the 3 gallon bucket again and fill the remainder of the 5 gallon bucket. Now there will be one gallon left in the 3 gallon bucket. Empty the 5 gallon bucket and pour the one gallon of water that is in the 3 gallon bucket into the 5 gallon bucket. Fill the 3 gallon bucket and pour into the 5 gallon bucket with one gallon in it. 2nd Solution: Fill 3g bucket and pour into 5g. Fill 3g again and fill remainder of 5g, leaves 1g in 3g bucket. Empty 5g, pour 1g from 3g into 5g, refill 3g and empty into 5g. Link to comment Share on other sites More sharing options...
Southpaw Posted May 24, 2019 Share Posted May 24, 2019 22 hours ago, Lastcat said: 4 criminals are caught and are to be punished. The Judge allows them to be freed if they can solve a puzzle. If they do not, they will be hung. They agreed. The 4 criminals are lined up on some steps (shown in picture attached). They are all facing in the same direction. A wall separates the fourth man from the other three. So to summarize:- Man 1 can see men 2 and 3. Man 2 can see man 3. Man 3 can see none of the others. Man 4 can see none of the others. The criminals are wearing hats. They are told that there are two white hats and two black hats. The men initially don't know what color hat they are wearing. They are told to shout out the color of the hat that they are wearing as soon as they know for certain what color it is. They are not allowed to turn round or move. They are not allowed to talk to each other. They are not allowed to take their hats off. Who is the first person to shout out and why? Answer in white, highlight for results: Man 3 and man 4 can’t see anyone.Man 1 can see a white and a black hat so he knows that he has two possibilities: he either has a white or a black hat.Man 2 can see that man 3 has a black hat. And he knows that it would be obvious to man 1 that he is wearing a white hat if he had a black hat. In that case, man 1 would have already shouted. Man 2 concluded that he is wearing a white hat because there were no other options. Good one. Took a minute to figure out. Link to comment Share on other sites More sharing options...
Dranoel Posted May 24, 2019 Share Posted May 24, 2019 You are a bus driver. On you first stop you pick up 5 passengers. On your second stop you pick up 3 more. On your 3rd stop 5 get on and 4 get off. On your 4th stop 7 get on 3 get off. On your 5th stop 6 get on and 9 get off. on your 6th stop all the passengers get off. What is the bus driver's name? Link to comment Share on other sites More sharing options...
Sarge Posted May 24, 2019 Share Posted May 24, 2019 1 minute ago, Dranoel said: You are a bus driver. On you first stop you pick up 5 passengers. On your second stop you pick up 3 more. On your 3rd stop 5 get on and 4 get off. On your 4th stop 7 get on 3 get off. On your 5th stop 6 get on and 9 get off. on your 6th stop all the passengers get off. What is the bus driver's name? Sarge! Link to comment Share on other sites More sharing options...
Lastcat Posted May 24, 2019 Share Posted May 24, 2019 Sarge Link to comment Share on other sites More sharing options...
Lastcat Posted May 24, 2019 Share Posted May 24, 2019 (edited) Edited May 24, 2019 by Lastcat Link to comment Share on other sites More sharing options...
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