Learn a Fact: 3 x 3

1
3
x  2
2
2
x  2
3
6
x  2
4
9
x  1
5
4
x  2
6
9
x  2
7
7
x  2
8
2
x  3
9
0
x  3
10
2
x  2
11
2
x  9
12
3
x  3
13
2
x  4
14
2
x  8
15
8
x  2
16
3
x  3
17
2
x  7
18
5
x  2
19
2
x  5
20
2
x  6

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3

x3


9

3

x3


9

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3
X 2
6
3
X 4
12