What should come in place of ‘?’ in the following number series?
2, 3, 10, 15, 26, 35, 50, ?
The pattern of the given number series is as following:
⇒ 12 + 1 = 2,
⇒ 22 – 1 = 3,
⇒ 32 + 1 = 10,
⇒ 42 – 1 = 15,
⇒ 52 + 1 = 26,
⇒ 62 – 1 = 35,
⇒ 72 + 1 = 50,
⇒ 82 – 1 = 63
Hence, the required number in place of question mark is 63.