What number would replace question mark (?) in the series given below: 2, 9, 20, 35, 54, 77, ?, 135

Question

Question

This question was previously asked in

UGC NET Official Paper-I (Held On: 14 Mar, 2023 Shift 1)

Answer 1

The logic followed here is:

{N + (N + 1)} x (N + 2)

⇒ (0 + 1) x 2 = 2

⇒ (1 + 2) x 3 = 9

⇒ (2 + 3) x 4 = 20

⇒ (3 + 4) x 5 = 35

⇒ (4 + 5) x 6 = 54

⇒ (5 + 6) x 7 = 77

⇒ (6 + 7) x 8 = 104

∴ The missing number is 104.

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