The difference between 34 and 21 is: 
The difference between 53 and 36 is: 
The difference between 34 and 21 is: 
The difference between 34 and 22 is: 
The difference between 64 and 21 is: 
The difference between 34 and 11 is: 
The difference between 42 and 29 is: 
The difference between 34 and 21 is: 