The difference between 21 and 12 is: 
The difference between 95 and 25 is: 
The difference between 24 and 12 is: 
The difference between 21 and 10 is: 
The difference between 61 and 12 is: 
The difference between 21 and 12 is: 
The difference between 29 and 10 is: 
The difference between 21 and 12 is: 