Question

If 5$9=135,4$8=122and 9$6=144 then 13$6=? A.168 B.158 C.178 D.128​

Answer 1

5$9 = 135
4$8 = 122
9$6 = 144

5$9 = 90 + 5*9 = 90 + 45 = 135

4$8 = 90 + 4*8 = 90 + 32 = 112

9$6 = 90 + 9*6 = 90 + 54 = 144

So,

13$6 = 90 + 13*6 = 90 + 78 = 168

So, option A will be your answer.

I hope this helped!