Question

The smallest number by which 32 has to be multiplied to get a cube is

• A. 2
• B. 4
• C. 5
• D. 8

Answer 1

Answer: (A)

2

Prime Factorisation of $32=2\times 2\times 2\times 2\times 2$
$=2^3\times 2^2$

To make $32$ a perfect cube it must be multiplied by $2$

$32\times 2=64=4^3$