2 X 4 =

(a)  

2 X 5 =

(a)  

2 X 3 =

(a)  

2 X 7 =

(a)  

2 X 8 =

(a)  

2 X 9 =

(a)  

2 X 10 =

(a)  

2 X 2 =

(a)