Question

If: 2=6, 3=12, 4=20, 5=30, 6=42, 9=??

Answer 1

 your answer would be 9=72 they are just multiplying the first number by 3 then 4 then 5 and so on and so on 

Answer 2

2*3=6, 3*4=12, 4*5=20, 5*6=30, 6*7=42, 7*8=56, 8*9=72, 9*10=90. 90 is your final answer