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 = $10 \times 10 \times 10$

The factors of 128 are not forming triplet, so it is not a perfect cube.

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

The correct option is A 128 128 = 4×4×4×2 343 = 7×7×7 216 = 6×6×6 1000 = 10×10×10 The factors of 128 are not forming triplet, so it is not a perfect cube.

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 = $10 \times 10 \times 10$

The factors of 128 are not forming triplet, so it is not a perfect cube.