Question

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

• A. $8$
• B. $6$
• C. $4$
• D. $2$

Answer 1

The correct option is A $8$

LCM of $21952=2\times 2\times 2\times 2\times 2\times 2\times 7\times 7\times 7$
$=2^2\times 2^3\times 7^3$

$\therefore \sqrt[3]{321952}=\sqrt[3]{32^3\times 2^3\times 7^3}$
$=2\times 2\times 7=28$
$\therefore$ Digit in the units' place of $\sqrt[3]{321952}=8$