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kartik1979
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IMO B.kartik1979 wrote:hi , can someone help how to arrive at a solution in the below sum
n^3 will be an Integer.
n^3 = 450*y
=(3^2)*(5^2)*2*y.
for n^3 to be a perfect cube, y must have two 2s, one 3 and one 5 as factors.
Therefore, I think y/[3*(2^2)*5] MUST be an Integer. Hence, the answer is B.
