The difference between 73 and 37 is: 
The difference between 88 and 44 is: 
The difference between 79 and 37 is: 
The difference between 73 and 31 is: 
The difference between 43 and 37 is: 
The difference between 73 and 17 is: 
The difference between 76 and 30 is: 
The difference between 73 and 37 is: 