TheGameIs21
Golden Member
- Apr 23, 2001
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Originally posted by: royaldank
This was posted at another site I read this morning. Thought it was interesting.
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You are sitting blindfolded at a table with some large number n of coins (n > 10) on it.
Each coin has a heads side and a tails side.
You are told that exactly 10 of the coins are currently heads up.
You are wearing gloves that will let you pick up, flip or move a coin, but not feel any differences in texture between sides.
Please make two groups of coins that contain exactly the same number of Heads-up coins.
You cannot see the coins, nor distiguish heads versus tails through touch.
quote:
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Originally posted by: nineball9
Pull out 10 coins to another group and flip them over.
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Good job. You are correct.
The problem is lacking details to support this answer.
If I have 50 coins and 10 are heads up... How do I know what pile to put what and then what do I flip? I'm gloved and blindfolded. I don't know where the original 10 heads up coins are located. If I have 50 coins and 40 are tails up (not specified) then the odds are unlikely I can luck into moving the correct coins.
What am I missing?