Question

Find the smallest number by which 128 must be divided to obtain a perfect cube.

Answer 1

128

128 = (2 x 2 x 2) x (2 x 2 x 2) x 2

Here, one 2 is left which does not form a triplet.

If we divide128 by 2 , then it will become a perfect cube

128/2 =  (2 x 2 x 2) x (2 x 2 x 2) x 2/2

 

64= (2 x 2 x 2) x (2 x 2 x 2) is a perfect cube.

Hence, the smallest number by which 128 should be divided to make it a perfect cube is 2.

Answer 2

Answer:

2

Step-by-step explanation:

128 / 2 = 64

As we know 8 square = 64  

And 4 cube = 64