Find the least number by which (59)(36)(17) has to be multiplied to obtain a perfect square?  Choose the correct option:	A) 5	B) 17	C) 85	D) 221	E) 223
For any perfect square the index of the power of each of its prime factors is even. in the given number the power of 5 and 17 have odd indices, while 3 has an even index.   The least number = (5)(17) = 85.   ANSWER:85
<result>C</result>
Find the least number by which (59)(36)(17) has to be multiplied to obtain a perfect square?