1+4=5
2+5=12
3+6=21
4+7=32
5+8=45
6+9=60
7+10=77
8+11=96
These are coded in sequence beginning with 1,2,3,so you gotta add 4, 5, 6, 7, with the appropriate number added to it, therefore you have the complete coded math problem. IT wouldn't make any sense to leave out the missing equations.
CORRECT ANSWER = 96
