Find the missing number.

2 3 31
5 7 368
1 4 ?

A) 25
B) 45
C) 17
D) 65

1 answer

C) 17

The pattern is:
2^2 + 1 = 3
3^3 = 31

5^2 + 3 = 28
7^3 = 343

1^4 + 3 = 4