Multiple choice general knowledge math & puzzles

1 3 7 13 ? 31

  1. 21

  2. 17

  3. 27

  4. 9
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pattern follows consecutive even number additions: 1+2=3, 3+4=7, 7+6=13, 13+8=21, and 21+10=31. The increment increases by 2 each time (2, 4, 6, 8, 10), making this a second-order arithmetic progression.

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