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Learn a Fact: 2 x 2

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

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2

x2


4

2

x2


4

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2
X 1
2
2
X 3
6

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