The difference between 83 and 51 is: 
The difference between 82 and 73 is: 
The difference between 82 and 51 is: 
The difference between 83 and 51 is: 
The difference between 63 and 51 is: 
The difference between 83 and 31 is: 
The difference between 91 and 59 is: 
The difference between 83 and 51 is: 