Multiple choice

In the following number series, one number is wrong. Find that wrong number. 3, 7, 13, 22, 31, 43, 57

  1. 13

  2. 22

  3. 31

  4. 57

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

The series pattern is: add 4, add 6, add 8, add 10 (giving 31+10=41, not 43). The number 43 breaks the pattern - it should be 41. After 31, we should add 10 to get 41, then add 12 to get 53. 43 is incorrect.

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