Find the next number in the series: 1, 2, 4, 7, 11, ?
- A. 17
- B. 15
- C. 14
- D. 16 ✓
Correct answer
D. 16
Explanation
The difference between terms increases by 1 each time (1,2,3,4), so the next difference is 5, giving 11 + 5 = 16.
D. 16
The difference between terms increases by 1 each time (1,2,3,4), so the next difference is 5, giving 11 + 5 = 16.