1.

What will come in the place of question mark (?) in the following number series?2, 3, -1, 8, -8, ?1. 82. 123. 174. 205. -20

Answer» Correct Answer - Option 3 : 17

The logic behind the following series is as follows:

⇒ 2 + 12 = 3

⇒ 3 – 22 = (-1)

⇒ -1 + 32 = 8

⇒ 8 – 42 = (-8)

⇒ -8 + 52 = ?

⇒ -8 + 25 = ?

⇒ ? = 17

 ∴ The value of ‘?’ is 17.



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