Multiple choice general knowledge math & puzzles

2,7,8,13,14,19,20,_

  1. 21

  2. 22

  3. 24

  4. 25
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pattern alternates between adding 5 and subtracting 9 (or adding 5 and adding 5, then subtracting 9 from the result). 2+5=7, 7+1=8? No. 2+5=7, 7+1=8? No. Actually: +5, +1, +5, +1... 2→7 (+5), 7→8 (+1), 8→13 (+5), 13→14 (+1), 14→19 (+5), 19→20 (+1), 20→25 (+5). Pattern: add 5, add 1, repeat.

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