The difference between 73 and 31 is: 
The difference between 99 and 72 is: 
The difference between 79 and 31 is: 
The difference between 73 and 30 is: 
The difference between 53 and 31 is: 
The difference between 73 and 11 is: 
The difference between 80 and 38 is: 
The difference between 73 and 31 is: 