Multiple choice general knowledge math & puzzles

1, 7, 3, 11, 5, 15, __, 19, 9

  1. 17

  2. 7

  3. 11

  4. 13
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is an alternating sequence. One series is 1, 3, 5, (7), 9 (adding 2). The other is 7, 11, 15, 19 (adding 4). The blank falls in the first series after 5, so the answer is 7.

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