Question

Mark (✓) against the correct answer
Which of the following numbers is a perfect cube?
(a) 121
(b) 169
(c) 196
(d) 216

Answer 1

(d) 216

$$\begin{gathered} 121=11\times 11 \\ 169=13\times 13 \\ 196=7\times 7\times 2\times 2 \end{gathered}$$

216 = $2\times 2\times 2\times 3\times 3\times 3={\left(2\right)}^3\times {\left(3\right)}^3={\left(6\right)}^3$

216 = 6³
Hence, 216 is a perfect cube.