1/21
What property do 'twin problems' fall under?
2/21
4x6=
3/21
9x2=
4/21
3x7=
5/21
5x6=
6/21
8x4=
7/21
2x9=
8/21
0x5=
9/21
1x11=
10/21
12x3
11/21
7x5=
12/21
4x6=
13/21
2x9=
14/21
7x3=
15/21
6x5=
16/21
4x8=
17/21
9x2=
18/21
5x0=
19/21
11x1=
20/21
3x12=
