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Learn a Fact: 1 x 9

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

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x9


9

9

x1


9

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1
X 8
8
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X 0
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