What is the smallest positive integer K such that the product of 1575 x K is a perfect square? Select the correct option:	A) 7	B) 9	C) 15	D) 25	E) 63
perfect square, is just an integer that can be written as the square of some other integer. For example 16=4^2, is a perfect square.   Now, 1575 = 3^2 * 5^2 * 7, so if k=7 then 1575 k = (3 * 5 * 7)^2, which is a perfect square (basically the least positive value of k must complete only the power of 7 to even power as powers of other primes are already even).   7nswer: 7.
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What is the smallest positive integer K such that the product of 1575 x K is a perfect square?