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# Find the Fake

2 replies to this topic

### #1 jrbraves26

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Posted 15 March 2013 - 04:54 AM

You have 50 coins that all look exactly the same. One of them is fake and weighs a few grams more than the others. Given a balance scale (not a triple beam scale), what is the fewest number of weightings you could use to find the fake coin? Explain.

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### #2 Pankaj Varma

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Posted 15 March 2013 - 05:55 AM

Edited by bonanova, 15 March 2013 - 05:58 AM.

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### #3 bonanova

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Posted 15 March 2013 - 05:57 AM

You have 50 coins that all look exactly the same. One of them is fake and weighs a few grams more than the others. Given a balance scale (not a triple beam scale), what is the fewest number of weightings you could use to find the fake coin? Explain.

Spoiler for Looks like

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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

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