Question

What number should 392 be multiplied to get a perfect cube

Answer 1

First, let us take the LCM of 392.
LCM =2x2x2x7x7.
Therefore, no. 2 doesn't have a pair.
So to make 392 a perfect square, we must multiply the no. to 392 which doesn't have a pair, (i.e) 2.
Hence, 392x2=784 which is a perfect square.