1.

Find the wrong number in this series 4, 5, 15, 49, 201, 1011, 60731. 52. 153. 494. 201

Answer» Correct Answer - Option 1 : 5

Concept used:

⇒ 2nd term = (1st term × 1 + 2)

⇒ 3rd term = (2nd term × 2 + 3)

⇒ 4th term = (3rd term × 3 + 4)

And so on..........

∴ 5 is the wrong answer.

 



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