Multiple choice general knowledge math & puzzles

0, 7, 15, 25, 38, 55, ?

  1. 71

  2. 72

  3. 77

  4. 79

  5. 75
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

First differences: 7-0=7, 15-7=8, 25-15=10, 38-25=13, 55-38=17. Second differences: 8-7=1, 10-8=2, 13-10=3, 17-13=4. The next second difference is 5, so next first difference is 17+5=22, and next term is 55+22=77.

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