Powers and Roots Practice Test 4

Question : 11 of 40

Marks: +1, -0

By what least number 1,792 be multiplied to obtain a number which is its perfect cube?

Solution:

1,792 = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 7

= 2^3 × 2^3 × 2^2 × 7

So it must be multiplied by

2 × 7^2 = 2 × 49 = 98.

Go to Question:

Prev Question

Next Question