Multiple choice general knowledge math & puzzles

0, 1, 3, 6, 10, 15, x

  1. 19

  2. 21

  3. 22

  4. 23
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This sequence follows the pattern of triangular numbers: 0, 1, 3, 6, 10, 15, 21... Each term increases by 1, then 2, then 3, then 4, then 5, then 6. The difference between consecutive terms increases by 1 each time: 1-0=1, 3-1=2, 6-3=3, 10-6=4, 15-10=5, so 21-15=6.

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