question_answer

Direction: Find the wrong number.

5, 27, 61, 122, 213, 340, 509

A) 27                    

B) 61

C) 122                              

D) 509

Correct Answer: A

Solution :

We have Clearly, the given series becomes a triangular pattern series of each term in IV is b. Then, in III, 27 must be replaced by \[(30-6)\] i.e., 24 and 12 by \[(24-6)\]i.e., 18. Again, in II, 34 must be replaced by \[(61-24)\]i.e., 37 and 22 by \[(37-18)\]i.e., 19. Thus, in the given series, 27 is wrong and mast be replaced by (5+19) i.e., 24.