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If two positive integers a and b are written as a = x^3y^2 and b = xy^3 , where x, y are prime numbers, then HCF ( a, b) is

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a = x3y2 ,  b = xy3 

HCF is the product of the smallest power of each common prime factor involved in the numbers, hence HCF (x3y2xy3) = xy2

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Ravindra Pindel

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