The difference between 86 and 31 is: 
The difference between 66 and 37 is: 
The difference between 82 and 31 is: 
The difference between 86 and 33 is: 
The difference between 46 and 31 is: 
The difference between 86 and 21 is: 
The difference between 94 and 39 is: 
The difference between 86 and 31 is: 