What is the smallest positive integer K such that the product of 450 x K is a perfect square?	Choose the correct option
A) 3  B) 9  C) 15  D) 25  E) 63
A 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, 450 = 3^2 * 5^2 *3 , so if k=3 then 450k = (3 * 5 * 3)^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).   3nswer: 3.
<result>A</result>
What is the smallest positive integer K such that the product of 450 x K is a perfect square?