The difference between 65 and 47 is: 
The difference between 21 and 13 is: 
The difference between 68 and 47 is: 
The difference between 65 and 41 is: 
The difference between 85 and 47 is: 
The difference between 65 and 17 is: 
The difference between 68 and 40 is: 
The difference between 65 and 47 is: 