Multiple choice general knowledge math & puzzles

Next number in the series 7,5,9,3,11,1,---

  1. 12

  2. 14

  3. 13

  4. 15
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This sequence follows two interleaved patterns. The odd-positioned terms (1st, 3rd, 5th, 7th) are 7, 9, 11, 13 - consecutive odd numbers increasing by 2. The even-positioned terms (2nd, 4th, 6th) are 5, 3, 1 - decreasing by 2. After 1, the next term (8th position) should continue the odd number pattern at 13, making the next odd-positioned term (9th) equal to 15. Alternatively, notice the pattern alternates between -2, +4, -6, +8, -10, +12 - making the next term 15.

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