Learn a Fact: 3 x 3

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

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3

x3


9

3

x3


9

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3
X 2
6
3
X 4
12