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KGS math club/solution 3 1

Revision as of 13:33, 1 July 2008 by Sigmundur (talk | contribs) (prettyprinting)
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The distance between the origin and a center of a little sphere is sqrt(12+12+...12) = sqrt(n)

=>

The radius of the big sphere is sqrt(n)-1

=>

So we must have sqrt(n)-1 <= 2, or n <= 9

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