9 x ? = 72

(a)  

2 x ? = 4

(a)  

8 x ? = 56

(a)  

7 x ? = 42

(a)  

9 x ? = 36

(a)  

8 x ? = 32

(a)  

5 x ? = 45

(a)  

3 x ? = 27

(a)  

4 x ? = 16

(a)  

8 x ? = 16

(a)  

6 x ? = 54

(a)  

3 x ? = 27

(a)  

8 x ? = 64

(a)  

9 x ? = 81

(a)