Which of the following number are not perfect cubes : (1)216
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1
Answer:
Cubes and Cube Roots. Grouping the prime factors of 216 into triples, no factor is left over. ∴ 216 is a perfect cube. ∴ 128 is not a perfect cube.
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Step-by-step explanation:
Doing prime factorization of 216
We see that
216 = 2×2×2×3×3×3
since 2&3 occur in triplets
216 is the perfect cube
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