I got 96 too based on redefining + to mean multiply the left hand value by the right hand value incremented by one so 1*(4+1), 2*(5+1), 3*(6+1) and 8*(11+1).If you take it to be similar but multiplied by the first part rather than incrementing from one, you get 96.
1 + 4 = 5Saw this on Facebook:
1+4=5
2+5=12
3+6=21
8+11=?
Any ideas?