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#41
10-22-2006, 12:28 PM
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Re: BRAIN TEASERS THREAD
[ QUOTE ]
[ QUOTE ] here is a favorite of mine You are rushing your mother to the hospital There is a fork in the road and you dont remember which way to go There are two twin brothers there, one who always lies and one who always tells the truth. They look identical, and it is impossible to tell them apart You only have time to ask one brother one question. And again, the one who answers you have no idea if he is the one who lies or tells the truth What one question can you ask so that no matter which brother answers, you will know which way to go to save your mother [/ QUOTE ] Answer: <font color="white"> "If I asked your brother which way is it to the hospital, what would he say?" Then go in the other direction. </font> [/ QUOTE ] Or:<font color="white"> There is an alternative answer. Ask one of them "If I were to ask you which way to go, what would you say?" Then go the way he says. </font> 
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#42
10-26-2006, 06:46 AM
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Re: BRAIN TEASERS THREAD
[ QUOTE ]
[ QUOTE ] [ QUOTE ] here is a favorite of mine You are rushing your mother to the hospital There is a fork in the road and you dont remember which way to go There are two twin brothers there, one who always lies and one who always tells the truth. They look identical, and it is impossible to tell them apart You only have time to ask one brother one question. And again, the one who answers you have no idea if he is the one who lies or tells the truth What one question can you ask so that no matter which brother answers, you will know which way to go to save your mother [/ QUOTE ] Answer: <font color="white"> "If I asked your brother which way is it to the hospital, what would he say?" Then go in the other direction. </font> [/ QUOTE ] Or:<font color="white"> There is an alternative answer. Ask one of them "If I were to ask you which way to go, what would you say?" Then go the way he says. </font> [/ QUOTE ] well the liar will say the wrong way but the truthteller will tell you the right way....effective....
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#43
10-26-2006, 10:21 AM
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Re: BRAIN TEASERS THREAD
[ QUOTE ]
[ QUOTE ] It takes 10 men 8 days to dig 13 holes. How long would it take one man to dig half a hole? [/ QUOTE ] Answer: <font color="white"> 40/13 days?</font> [/quote Please tell me this is for real
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#44
10-26-2006, 10:44 AM
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Re: BRAIN TEASERS THREAD
[ QUOTE ]
[ QUOTE ] [ QUOTE ] [ QUOTE ] here is a favorite of mine You are rushing your mother to the hospital There is a fork in the road and you dont remember which way to go There are two twin brothers there, one who always lies and one who always tells the truth. They look identical, and it is impossible to tell them apart You only have time to ask one brother one question. And again, the one who answers you have no idea if he is the one who lies or tells the truth What one question can you ask so that no matter which brother answers, you will know which way to go to save your mother [/ QUOTE ] Answer: <font color="white"> "If I asked your brother which way is it to the hospital, what would he say?" Then go in the other direction. </font> [/ QUOTE ] Or:<font color="white"> There is an alternative answer. Ask one of them "If I were to ask you which way to go, what would you say?" Then go the way he says. </font> [/ QUOTE ] well the liar will say the wrong way but the truthteller will tell you the right way....effective.... [/ QUOTE ] well the first answer, <font color="white"> "If I asked your brother which way is it to the hospital, what would he say?" Then go in the other direction. </font> is 100% correct and works
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#45
10-26-2006, 10:46 AM
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Re: BRAIN TEASERS THREAD
This one has been posted before as well
10 Encylopedia are shelved in an orderly fashion. Each book contains 100 pages, numbered 1 through 100, with text on only one side per page. A bookworm starts eating at page 1 of book 1, and eats all the way through page 100 of book 10. Not counting covers, out of 1000 possible pages, how many pages did the bookworm eat through
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#46
10-26-2006, 11:28 AM
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Re: BRAIN TEASERS THREAD
[ QUOTE ]
Not counting covers, out of 1000 possible pages, how many pages did the bookworm eat through [/ QUOTE ] Ans: <font color="white">800 pages, and 18 of the 20 covers</font>
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#47
10-26-2006, 12:19 PM
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Re: BRAIN TEASERS THREAD
[ QUOTE ]
[ QUOTE ] Not counting covers, out of 1000 possible pages, how many pages did the bookworm eat through [/ QUOTE ] Ans: <font color="white">800 pages, and 18 of the 20 covers</font> [/ QUOTE ] not quite right, but you have the idea. And i said not counting covers, but your amount of covers was correct. Real close
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#48
10-26-2006, 01:45 PM
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Re: BRAIN TEASERS THREAD
[ QUOTE ]
not quite right, but you have the idea. And i said not counting covers, but your amount of covers was correct. Real close [/ QUOTE ] OK, I re-read it: <font color="white">It's 801 or 802. Page 100 of book 10 was eaten through, but it's not clear whether or not page 1 of book 1 was.</font>
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#49
10-26-2006, 03:49 PM
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Re: BRAIN TEASERS THREAD
[ QUOTE ]
[ QUOTE ] [ QUOTE ] [ QUOTE ] here is a favorite of mine You are rushing your mother to the hospital There is a fork in the road and you dont remember which way to go There are two twin brothers there, one who always lies and one who always tells the truth. They look identical, and it is impossible to tell them apart You only have time to ask one brother one question. And again, the one who answers you have no idea if he is the one who lies or tells the truth What one question can you ask so that no matter which brother answers, you will know which way to go to save your mother [/ QUOTE ] Answer: <font color="white"> "If I asked your brother which way is it to the hospital, what would he say?" Then go in the other direction. </font> [/ QUOTE ] Or:<font color="white"> There is an alternative answer. Ask one of them "If I were to ask you which way to go, what would you say?" Then go the way he says. </font> [/ QUOTE ] well the liar will say the wrong way but the truthteller will tell you the right way....effective.... [/ QUOTE ] What? The truthteller will obviously tell you the right way, but so will the liar. The liar knows he would tell you the wrong answer to the question "Which is the right way?" so when you ask him "If I were to ask which way is the right way, what would you tell me?" he would have to lie about his answer, so he tells you the correct way.
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#50
10-26-2006, 08:37 PM
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Re: BRAIN TEASERS THREAD
[ QUOTE ]
[ QUOTE ] not quite right, but you have the idea. And i said not counting covers, but your amount of covers was correct. Real close [/ QUOTE ] OK, I re-read it: <font color="white">It's 801 or 802. Page 100 of book 10 was eaten through, but it's not clear whether or not page 1 of book 1 was.</font> [/ QUOTE ] jam <font color="white">yes jam 802 is correct.</font>
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