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Thursday, April 14, 2011

Factors

Recall also that any perfect square has an odd number of factors. If there is an even number of even factors, that means there must be an odd number of odd factors. An odd number of odds added together will be odd. So the sum of the factors of the number will be even + odd = odd.

Refer to MGMAT CAT 5 Q 35. { revise before exam}

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