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Learn a Fact: 2 x 9

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

Fact Navigator

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2

x9


18

9

x2


18

Move on to other facts:
2
X 8
16
3
X 0
0

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