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Find the smallest number $y$ such that $y \times 162$ is a perfect cube.

  1. $24$
  2. $27$
  3. $32$
  4. $36$
in Numerical Ability by
edited by | 2.3k views

4 Answers

+20 votes
Best answer
$y \times 162 = y \times 3^4 \times 2$

So, for perfect cube we need to add two $3s$ and two $2s.$

Answer is: $3^2 \times 2^2= 36.$

Correct Answer: $D$
by
edited by
+6 votes

162 = 2 * 33 * 3

hence we can see the value which have two 2's and 2 3's wil be minimum value = 4 * 9 = 36 so option 4

by
+3 votes
Ans. 36

Factorization of 162 = 2*9*9

So, multiply by 2*2*9 to make perfect cube
by
+2 votes
very easy just putting the options as the value of Y we get 36

so D is the correct answer i guess
by
+2
putting option is time consuming , just factorize everything is clear.
Answer:

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