Question

Which of the following numbers are not perfect cubes?
(1) 216
(ii) 128
(iii) 1000​

Answer 1

Answer:

Grouping the prime factors of 216 into triples, no factor is left over. ∴ 216 is a perfect cube. ∴ 128 is not a perfect cube. ∴ 1000 is a perfect cube.

Step-by-step explanation:

Answer 2

answer : 128

$128 = 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2$

one 2 is remaining after grouping the triplets of 2.

Therefore ,128 is not a perfect cube