SSC CGL 20 Aug 2021 Shift 2 Paper

Question : 14 of 100

Marks: +1, -0

Study the given pattern carefully and select the number that can replace the question mark (?) in it.

Solution:

As,

7,35,13 ⇒(13-7) ⇒ 6

⇒ 6^{2}-1 ⇒ 35

and

9,24,14 ⇒(14-9) ⇒ 5 ⇒ 5^{2}-1

⇒ 24

Similarly, 13, 120, ?

\Rightarrow

-13

⇒ \;\; (?-13)^{2}-1=120

⇒ \;\; (?-13)^{2}=121

⇒ \;\; ?-13=11

∴ \;\; ? \;\; ?=24

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