Question

what is least number by which 13720 must be divided so the quotient is a perfect cubewhat is the smallest number by which 392 must be multiplied so that the product is a perfect cube
​

Answer 1

Write 13720 as product of prime numbers

13720 =2*2*2*7*7*7*5

=(2*2*2)*(7*7*7)*5

Only 5 is isolated

To make 13720 perfect cube we have to divide it with 5