[johngriffen]

Number - 18, 6
18 - 6 = 12

[prokroustis]

Numbers: 13, 6
13-6 = 7

Left:
1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 14, 15, 17, 18, 19, 20

[Misstee]

Numbers 17, 5

17 - 5 = 12

[WordDiva]

Numbers: 18, 3
18 - 3 = 15

[ozswede]

Numbers: 17 & 3

17 + 3 = 20

[Beetzart]

Numbers 10, 7
10 - 7 = 3

[Bookbanshee]

Numbers 5 and 2
5 - 2 = 3

Number: 1, 8
8 - 1 = 7

Number: 10
19-10=9

Numbers Left:
1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 14, 15, 17, 18, 20

[lush]

Numbers: 14, 3
14 + 3 = 17
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

[HogwartsExpress]

Numbers 7, 2
7 x 2 = 14
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20

[hija]

Numbers: 4 (previous), 5
5 * 4 = 20

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20

[Hizzytee]

My numbers - 3, 8
8 + 3 =11

Numbers Left:
1, 2, 4, 5, 6, 7, 8, 9, 10, 14, 16, 17, 18, 19, 20

[goldie0608]

Numbers - 14, 10
14 - 10 = 4

Numbers: 12, 4
12 - 4 = 8

1, 2, 3, 4, 5, 6, 7, X, 9, 10, 11, X, X, 14, 15, 16, 17, 18, X, 20