Test Preparation on IBPS Clerk preliminary Model Paper-7 (2015)

(Directions 1-5):

In each of the following number series, a wrong number is given, find
out that number.

1.

Quantitative Aptitude:

3  9  23 99 479 2881 20159

The series is 3 × 2 + 3 = 9, 9 × 3 ⎯4 = 23, 23 × 4 + 5 = 97, 97 × 5 ⎯6 = 479, 479 × 6 + 7 =
2881, 2881 × 7 ⎯8 = 20159
Hence, there should be 97 in place of 99.

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