78.6k views
111 ratings
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By dook
Question: Four men walk into the desert. Suddenly all four are simultaneously knocked out. They awake buried to their heads in the sand unable to look anywhere but straight ahead. They are positioned so that each man sees another's head before him. However between the first and second man there is a separating wall. So the first man sees only desert. The second man sees only wall. The third man sees another's head and a wall. The fourth man sees two heads and a wall. On top of each mans head is a hat. The underside of each cap is black, but the outside of each cap is either blue or white. Before any of the men can speak, their captors tell them if they speak, they die. However, if any of them can guess the color of their cap on the first try they go free. The captors tell them that there are two blue caps and two white caps. Being an omniscient observer of the situation, we know that the order of the caps are: blue, white, blue, white. So knowing the perspective of each man in the sand, and that they can only see the color of caps/wall/desert in front of them, which of the four men knows for certain the color of his own cap. More importantly: why?
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2082 ratings
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Question: During what month do people sleep the least?
24.5k views
22 ratings
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By Bist
Question: People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?
3.6M views
4785 ratings
19 saves
Question: When is 99 more than 100?
42k views
54 ratings
1 saves
By daphne101
Question: What are the next two letters in the following series and why? WATNTLITFS__
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10 ratings
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Question: Surrounded by life , yet life is its biggest enemy. But without life there is no need for it to exist. What is it?