Quantitative Aptitude Ques 403

Question: The sum of digits of the smallest number, which when multiplied by 800, gives a perfect cube is

Options:

A) 2

B) 1

C) 3

D) 4

Show Answer

Answer:

Correct Answer: B

Solution:

  • $ 800=2\times 2\times 2\times 2\times 2\times 5\times 5=2^{5}\times 5^{2} $ To make a perfect cube we need $ 2\times 5 $ to be multiplied by 800. Sum of digits of $ (2\times 5=10)=1+0=1 $
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