Multiple choice general knowledge math & puzzles

10,5,13,10,16,20,19,?

  1. 22

  2. 40

  3. 38

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

This is two interleaved series at odd and even positions. Odd positions: 10, 13, 16, 19 (increasing by 3). Even positions: 5, 10, 20, ? (each term doubles the previous). The missing term is 20×2=40. Option A (22) and D (23) don't follow either pattern, C (38) is close but incorrect.

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