Multiple choice

42 45 52 65 86 ?

  1. 124

  2. 115

  3. 117

  4. 104
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The differences are 3, 7, 13, 21. The second differences are 4, 6, 8. The next second difference is 10, so 21+10=31. 86+31=117.

Keep practicing — related questions