RRB NTPC Mains or Stage 2 Model Paper 9 with solutions

Question : 57 of 120

Marks: +1, -0

5   9   15
16   29   ?
49   89   147

Solution:

(b)

5 × 3 + 1 = 16; 9 × 3 + 2 = 29;

16 × 3 + 1 = 49; 29 × 3 + 2 = 89;

15 × 3 + 3 = 48; 48 × 3 + 3 = 147.

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