YKeselman
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AnswersYou stand in one corner of a large room, and your assistant is in its opposite corner. In front of the assistant is a 4-corner table, with a coin in each of the 4 corners. Your objective is to get the coins to be all heads or all tails. When that happens, the coins start jumping up and down; so, you'll know for sure when it happens. What you can do is to tell your assistant: (a) flip one coin; (b) flip two coins on a side of the table; (c) flip two coins on a diagonal of the table. You can't tell the assistant which coin, which side, or which diagonal to use. You can either think of your assistant as being extremely dumb, or that the table is being constantly rotated by external forces. What is the sequence of commands that you should give to your assistant to make sure the coins start jumping up and down?
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Looks fine, though trying to explain it in terms of "odd man out" when you have two tails and two heads (after you assumed one and did one flip and you did not win) is confusing. It should be best explained in terms of "3 heads 1 tail", then "2 heads on the diagonal", "2 heads on one side", etc. Otherwise, it's difficult to follow. Good effort!
- YKeselman September 09, 2014