Question

Which of the following numbers is a perfect cube ?
(a) 141 (b) 294
(d) 216 (d) 496

Answer 1

(a) 141 = $3\times 47$

(b) 294 = $2\times 7\times 7\times 3$

(c) 216 = $2\times 2\times 2\times 3\times 3\times 3=2^3\times 3^3$

(d) 496 = $2\times 2\times 2\times 2\times 31$

We see that 216 is a perfect cube