Find out the wrong number in the series given below :
1, 2, 8, 33, 148, 760, 4626
A. 8
B. 148
C. 760
D. 4625
Sol:
2nd term = 1st term × 1 + 12 = 1 × 1 + 12 = 2
3rd term = 2nd term × 2 + 22 = 2 × 2 + 22 = 8
4th term = 3rd term × 3 + 32 = 8 × 3 + 32 = 33
5th term = 4th term × 4 + 42 = 33 × 4 + 42 = 148
6th term = 5th term × 5 + 52 = 148 × 5 + 52 = 765 ≠ 760
