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If (n-2)! = (n! + (n-1)!)/99, and n is a positive integer, then n=?
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Problem Solving (PS)
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2^(22) + 2^(23) + 2^(24) + ... + 2^(43) + 2^(44) =
Nov 21, 2010
6
X, Y, and Z are three different Prime numbers, the product
Dec 09, 2010
4
For all real numbers a and b, where a ⋅ b =/ 0, let a◊b = ab
Oct 04, 2010
3
Re: Tough airthmetic
Dec 06, 2010
3
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