120, 99, 80, 63, 48, ?
2023
120, 99, 80, 63, 48, ?
- A.
35
- B.
38
- C.
39
- D.
40
Attempted by 207 students.
Show answer & explanation
Correct answer: A
Key pattern: each term is found by subtracting odd numbers that decrease by 2 each step.
Compute successive differences: 120 → 99 = −21, 99 → 80 = −19, 80 → 63 = −17, 63 → 48 = −15.
The subtractions are odd numbers that decrease by 2 each time: 21, 19, 17, 15, so the next subtraction is 13 (15 − 2).
Apply the next subtraction: 48 − 13 = 35.
Conclusion: The correct next term is 35. The other choices (38, 39, 40) do not follow the established difference pattern.