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20 questions
3x9=?
9
21
15
27
8x3=?
6
24
18
12
6x3=?
18
6
12
15
3x3=?
3
6
9
12
3x7=?
15
27
21
18
5x3=?
15
6
12
18
3x0=?
18
9
6
0
4x3=?
15
18
12
21
3x10=?
30
27
18
24
8x3=?
24
12
18
21
3x2=?
3
6
9
12
6x3=?
18
15
12
9
5的3倍是?
6
27
15
21
8的3倍是?
6
21
27
24
3的0倍是?
6
9
3
0
9的3倍是?
27
21
18
24
6的3倍是?
15
6
18
12
1的3倍是?
1
3
6
9
7的3倍是?
21
27
24
18
3的10倍是?
24
21
27
30
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