Quantitative Aptitude Ques 2017

Question: Directions: What will come in place of question marks in the given questions?

$ 9^{2}\times 7^{2}\div \sqrt{441}-64={5^{?}} $

Options:

A) 4

B) 2

C) 5

D) 3

Show Answer

Answer:

Correct Answer: D

Solution:

  • $ 9^{2}\times 7^{2}\div \sqrt{441}-64={5^{?}} $

$ \Rightarrow $ $ 81\times 49\div 21-64={5^{?}} $

$ \Rightarrow $ $ 3969\div 21-64={5^{?}} $

$ \Rightarrow $ $ 189-64={5^{?}} $

$ \Rightarrow $ $ 125={5^{?}} $
$ \Rightarrow $ $ 5^{3}={5^{?}} $

$ \therefore $ $ ?=3 $

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