Sainik School Entrance Exam 2018 Solved Paper

Question : 19 of 150

Marks: +1, -0

By what least number should 648 be multiplied to get a perfect cube?

Solution:

(c)

648={2 ×2 ×2}↙{──────} ×{3 ×3 ×3}↙{──────} × 3

If we multiply 648 by 9 then it becomes a perfect cube.
So, least no.

=9

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