Question

The digit in the units' place in the cube root of 21952 is

• A. 8
• B. 6
• C. 4
• D. None of these

Answer 1

The correct option is A 8

$219542=4\times 4\times 4\times 7\times 7\times 7=4^3\times 7^3$

So, cube root of $219542$ is $\sqrt[3]{3219542}=\sqrt[3]{34^3\times 7^3}=4\times 7=28$.

So, the required digit in the units' place is $8$.