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Question


What is the minimum number that should be multiplied with 360 in order to make it a perfect cube ?


Options:
A .   75
B .   70
C .   65
D .   80
Answer: Option A
:
A

For a number to be a perfect cube, its prime factors should be in the form of triplets i.e. every prime factor should be raised to the power in multiples of 3
Prime factorizing the given number, we get 360=2×2×2×3×3×5
Hence, we can see that the given number must be multiplied by 3×5×5 i.e.75



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