Find the next number in the series: 100, 90, 81, 73, 66, ?
- A. 59
- B. 58
- C. 60 ✓
- D. 61
Correct answer
C. 60
Explanation
The differences between terms decrease by 1 each time (-10, -9, -8, -7), so the next difference is -6, giving 66 - 6 = 60.
C. 60
The differences between terms decrease by 1 each time (-10, -9, -8, -7), so the next difference is -6, giving 66 - 6 = 60.