If y is the smallest positive integer such that 630 multiplied by y is the square of an integer, ...

If y is the smallest positive integer such that 630 multiplied by y is the square of an integer, then y must be

Quiz

Answer/Solution

70

Steps/Work

630 = 2*3^2*5*7
To be perfect square, we need to multiply by at least 2*5*7 = 70.
The answer is D.