Question

2+3=8,
3+7=27,
4+5=32,
5+8=60,
6+7=72,
7+8=??

Solve it?

Answer 1

2+3=8,
3+7=27,
4+5=32,
5+8=60,
6+7=72,
7+8=

can be thought of as

2*(2+3-1) = 8
3*(3+7-1) = 27
4*(4+5-1) = 32
5*(5+8-1) = 60
6*(6+7-1) = 72
7*(7+8-1) =

Answer 2

The general rule/pattern is

x+y = x*(x+y-1)

Answer 3

\[x+y=x[y+(x-1)]=x^2+xy-x\]\[7^2+7*8-7\]