3x3 =

(a)  

4x5 =

(a)  

2x4=

(a)  

1x4=

(a)  

2x9 =

(a)  

5x5=

(a)  

3x3 =

(a)  

2x9=

(a)  

4x4 =

(a)  

3x4 =

(a)  

2x0=

(a)  

12x1

(a)  

4x6

(a)  

3x7

(a)  

2x7 =

(a)  

4x4 =

(a)  

5x10 =

(a)  

4x9 =

(a)  

3x3 =

(a)  

2x2=

(a)  

3x9=

(a)  

9x3 =

(a)  

4x6 =

(a)  

5x5 =

(a)