What number should come in the blank?

Look at this series: 2, 5, 9, 15, 25, ____.
(a) 40
(b) 36
(c) 37
(d) 43

Anurag Mishra Professor Asked on 31st December 2015 in Reasoning Questions.
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1 Answer(s)

Answer: (d) 43

Explanation:-
  5 x 2 – 1 = 9, 
  9 x 2 – 3 = 15, 
15 x 2 – 5 = 25

Same as, 
25 x 2 – 7 = 43.

Then, the missing number is 43. 

Hence, the correct answer is option (d) 43. 

Anurag Mishra Professor Answered on 3rd January 2016.
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