Select the number from among the given options that can replace the question mark (?) in the following series. 10, 22, 35, 40, 72, 40, ?
- A.131
- B.134
- C.133
- D.143
Explanation
Differences follow 1²+2², +1²+2²−2³, +1²+2²−2³+3³, ... Working out: 7th term = 40 + 1 − 8 + 27 − 64 + 125 = 40 + 81 + 12 = 133.




