Delhi Police Constable Exam Model Paper 1

Question : 56 of 100

Marks: +1, -0

What will come in place of the blank in the series?5, 9, 17, 33, ____, 129, 257

Solution:

The pattern followed is,

5 × 2 – 1 = 9

9 × 2 – 1 = 17

17 × 2 – 1 = 33

33 × 2 – 1 =65

65 × 2 – 1 = 129

129 × 2 – 1 = 257

Hence, “65” is the correct answer.

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