SSC JE Mechanical Engineering 22 Mar 2021 Shift 2 Papers

Question : 16 of 199

Marks: +1, -0

Select the option that is related to the third number in the same way as the second number is related to the first number.
12 ∶ 138 ∶∶ 14 ∶ ?

Solution:

The logic follows here is:
First number : (First number)

^2

- (First number/2) = Second number

12 ∶ 138 → 12 : 12^2 - 12\/2

= 12 : 144 - 6 = 138

Similarly,

14 : ? → 14 : 14^2 - 14\/2

= 14 : 196 - 7 = 189

Hence, "189" is the correct answer.

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