The difference between 12 and 11 is: 
The difference between 96 and 90 is: 
The difference between 17 and 11 is: 
The difference between 12 and 11 is: 
The difference between 72 and 11 is: 
The difference between 12 and 11 is: 
The difference between 20 and 19 is: 
The difference between 12 and 11 is: 