Complete the series 3, 6, 5, 20, 7, 42, 9, ??, ??

Question

If:

2=6     
3=12
4=20
5=30
6=42

Then

9= ??

Answer 1

3, 6, 5, 20, 7, 42, 9, 72, 11
Basically there are two series -
Check the alternate number then you will identify there is one series 3, 5, 7, 9, ?
and second series is 6, 20, 42, 74
For 11 approach is 3, 5, 7, 9, 11 -> add 2 to the previous number.
and for 72 approach is 3*2, 5*4, 7*6, 9*8=72

Answer 2

3, 6, 5, 20, 7, 42, 9, 72, 11