Multiple choice

Directions: Find out the wrong term in the given series. 1, 2, 6, 15, 31, 56, 91

  1. 31

  2. 15

  3. 56

  4. 91

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pattern follows adding consecutive integers: 1+1=2, 2+4=6, 6+9=15, 15+16=31, 31+25=56, 56+36=92. Since the series ends in 91 instead of 92, 91 is the wrong term.

AI explanation

The series follows the pattern of adding consecutive perfect squares. The differences between the terms are 1^2, 2^2, 3^2, 4^2, 5^2 and 6^2. Adding 6^2 (36) to 56 gives 92, so the term 91 is wrong.

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