Complete the series: 11, 29, 55, ?, 131 :

  1. 81,
  2. 110
  3. 78
  4. 89
Anurag Mishra Professor Asked on 14th December 2015 in Reasoning Questions.
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1 Answer(s)

Answer: (4) 89

Explanation:-

The square of 3 + 2 x 1 = 9 + 2 = 11,
The square of 5 + 2 x 2 = 25 + 4 = 29,
The  square of 7 + 2 x 3 = 49 + 6 = 55,
The  square of 9 + 2 x 4 = 81 + 8 = 89
The square of 11 + 2 x 5 = 121 + 10 = 131

Hence, the answer is (4) 89.

Anurag Mishra Professor Answered on 15th December 2015.
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