You are at one end of a hall blindfolded. At the other end are Alex and Bert. You are allowed to ask any yes or no questions you want, but only one of them will respond. They are standing next to each other and their voices are identical, so you have no way of telling which one responded by sound alone.

Using as few questions as possible, find out the type of each Alex and Bert and who answered your last question.

(In reply to 2 questions by rerun141)

the problem says they only answer yes or no questions. you asked them to give you a name and they cannot do that.

the correct solution:
1) would your partner say that you tell the truth?
2) is your name alex? (you can also ask "is your name bert?")

Posted by donnmike on 2003-12-30 13:48:26