The difference between 12 and 10 is: 
The difference between 98 and 73 is: 
The difference between 11 and 10 is: 
The difference between 12 and 11 is: 
The difference between 72 and 10 is: 
The difference between 12 and 10 is: 
The difference between 21 and 19 is: 
The difference between 12 and 10 is: 