The difference between 33 and 31 is: 
The difference between 66 and 52 is: 
The difference between 38 and 31 is: 
The difference between 33 and 32 is: 
The difference between 53 and 31 is: 
The difference between 33 and 11 is: 
The difference between 41 and 39 is: 
The difference between 33 and 31 is: 