Find the next number in the series: 90, 80, 71, 63, 56, ?
- A. 49
- B. 50 ✓
- C. 48
- D. 51
Correct answer
B. 50
Explanation
The differences between terms decrease by 1 each time (-10,-9,-8,-7), so the next difference is -6, giving 56 - 6 = 50.
B. 50
The differences between terms decrease by 1 each time (-10,-9,-8,-7), so the next difference is -6, giving 56 - 6 = 50.