Posted by melissa on Saturday, September 27, 2008 at 9:04pm.
32 = 2*2*2*2*2 = 2^5
81 = 3*3*3*3 = 3^4
Prime factors of 32? 2 to some power. Try 2x2x2x2x2 or 2^5
81 is 9x9, so it must be in prime 3x3x3x3 or 3^4
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