The difference between 56 and 31 is: 
The difference between 84 and 54 is: 
The difference between 55 and 31 is: 
The difference between 56 and 33 is: 
The difference between 66 and 31 is: 
The difference between 56 and 21 is: 
The difference between 60 and 35 is: 
The difference between 56 and 31 is: 