Multiple choice

Find the incorrect term in the given sequence. 1, 2, 6, 15, 31, 56, 91

  1. 31

  2. 56

  3. 91

  4. 115
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C Correct answer
Explanation

1, 1 + 12 = 2, 2 + 22 = 6, 6 + 32 = 15, 15 + 42 = 31, 31 + 52 = 56, 56 + 62 = 92 Last number of the given series must be 92 instead of 91.

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