• 3. Which of the following is not a perfect cube?
o A. 216
B. 1000
• C. 243
D. 1331
step-by-step answer
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Answer:
243 is the answer
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Step-by-step explanation:
(i) 216=2×2×2×3×3×3= 2
3
×3
3
=6
3
So, 216 is a perfect cube.
(ii) 128=2×2×2×2×2×2×2
= 2
3
×2
3
×2=6
3
×2
So, 128 is not a perfect cube.
(iii) 1000=2×2×2×5×5×5=10
3
So, 1000 is a perfect cube.
(iv) 100=2×2×5×5=10
2
So, 100 is not a perfect cube
(v) 46656=2×2×2×2×2×2×3×3×3×3×3×3=36
3
So, 46656 is a perfect cube.
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