In the following number series a wrong number is given Find out the wrong number 3 13 33 137 681 409...........

Quantitative Aptitude(IBPS RRB PO) Number series

In the following number series, a wrong number is given. Find out the wrong number.

3, 13, 33, 137, 681, 4090

This questions was previously asked in

RRB PO Prelims (21 August 2022 Shift1)

681

4090

137

Correct option 3: 4090

The pattern of given series is:
3x2+7= 13
1336 33
33 x 4+ 5 = 137
137 x 5-4 = 681
⇒ 681 × 6 + 3 = 4089
.. The wrong number in the series is 4090

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