1, 2, 8, 33, 148, 760, 4626

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