The difference between 13 and 10 is: 
The difference between 55 and 43 is: 
The difference between 13 and 10 is: 
The difference between 13 and 10 is: 
The difference between 73 and 10 is: 
The difference between 13 and 10 is: 
The difference between 20 and 17 is: 
The difference between 13 and 10 is: 