answer =7 add first two digits and from the result deduct the third number ie14-7=7

2+3=5 -1 =4,....so on 8+6=14-7=7.

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

If 5 - 4 = 23 8 - 1 = 63 6 -16 = 32 9 - 9 = 78 3 - 9 = 6 then 3 - 81 = ?