2 Times

2x1=2

2x2=4

2x3=6

2x4=8

2x5=10

2x6=12

2x7=14

2x8=16

2x9=18

2x10=20

2x11=22

2x12=24

2x13=26

2x14=28

2x15=30

2x16=32

2x17=34

2x18=36

2x19=38

2x20=40