Ans : 2 = 10
Solution:
8 * 11 = 88 7 * 10 = 70 6 * 9 = 54 5 * 8 = 40 4 * 7 = 28 .................. so that 2 * 5 = 10
8*11=88 7*10=70 6*9=54 5*8=40 4*7=28 3*6=18 **2*5=10 **
If 3+3*4 = 28, 4+4*6=54, 5+5*7=77 then 6+6*9 = ??