The difference between 32 and 21 is: 
The difference between 49 and 40 is: 
The difference between 39 and 21 is: 
The difference between 32 and 21 is: 
The difference between 82 and 21 is: 
The difference between 32 and 21 is: 
The difference between 40 and 29 is: 
The difference between 32 and 21 is: 