The difference between 83 and 81 is: 
The difference between 31 and 29 is: 
The difference between 86 and 81 is: 
The difference between 83 and 80 is: 
The difference between 93 and 81 is: 
The difference between 83 and 41 is: 
The difference between 90 and 88 is: 
The difference between 83 and 81 is: 