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प्रश्न
Find the least number by which 77, 175 should be divided to make it a perfect cube number.
पर्याय
200
525
15
225
MCQ
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उत्तर
225
Explanation:
77175 = 5 × 15435
= 5 × 5 × 3087
= 5 × 5 × 9 × 343
= 5 × 5 × 3 × 3 × 7 × 7 × 7
We cannot make triplets of 5 and 3, hence the given no. must be divided by 25 × 9 = 225, to make it a perfect cube.
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Number System (Entrance Exam)
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