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

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Solution

Given the numbers
(i) $216 = 6^{3}$ is a perfect cube number.
(ii) $128 = 2^{7}$ , not a perfect cube number.
(iii) $1000 = (10)^{3}$ is a perfect cube number.

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(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) $46656$

Which of the following numbers are notperfect cubes?

(i) 216

(ii) 128

(iii) 1000

(iv) 100

(v) 46656

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