Which of the following numbers is not a perfect cube number?

128

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343

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216

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1000

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Solution

The correct option is A
128

128 = $4 \times 4 \times 4 \times 2$

343 = $7 \times 7 \times 7$

216 = $6 \times 6 \times 6$

1000 = $10 \times 10 \times 10$

We can clearly see factors of 128 are not forming triplet, so it is not a perfect cube

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Similar questions

216

128

1000

(1) 216, (2) 128, (3) 1000, (4) 100, (5) 46656

Which of the following are not perfect cubes?
(i) $216$
(ii) $128$
(iii) $1000$
(iv) $100$
(v) $46656$

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