Q. 3 A

# Which of the following numbers are not perfect cubes?

128

Answer :

128

Prime Factorization:

⇒ 128 = 2 × 2 × 2 × 2 × 2 × 2 × 2

= 2^{3} × 2^{3} × 2

There is only one 2.

∴ 128 is not a perfect cube.

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