proof

来源: passenger101 于 2017-01-12 16:14:07 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (267 bytes)
回答: 请教 求证题 由 追书 于 2016-11-09 15:08:10

n gold and n silver. >>>2n beads.

n is even because: 

View each string of the same colored beads as a single block. Then n blocks alternate. Thus n must be even. 

 

 

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