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 Ninety nine coins plus one catch (Posted on 2014-06-01)
You are given a task of locating one faulty coin out of 99 identical in appearance coins i.e. 98 of equal weight and one of a lesser weight; and to achieve it within seven weighings, using a balance scale.

Sounds familiar and easy (37>99)?

Familiar? Yes.

Easy? Not quite!

How can you accomplish it if no coin may be weighed more than twice ?

How many coins (n-1 normal and one lighter) can be resolved within k weighings?

 No Solution Yet Submitted by Ady TZIDON No Rating

 Subject Author Date Correction! (and bonus task) tomarken 2014-07-02 14:56:37 Solution, explained tomarken 2014-07-02 12:57:46 re(3): Any thoughts on this one? small hint - open to all Ady TZIDON 2014-07-02 12:30:59 re(2): Any thoughts on this one? tomarken 2014-07-02 09:46:41 re: Any thoughts on this one? Ady TZIDON 2014-07-02 02:46:21 Any thoughts on this one? tomarken 2014-06-30 16:50:58 E R R O R : ninety six is the correct number Ady TZIDON 2014-06-01 16:03:33

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