The difference between 72 and 56 is: 
The difference between 65 and 57 is: 
The difference between 77 and 56 is: 
The difference between 72 and 50 is: 
The difference between 82 and 56 is: 
The difference between 72 and 56 is: 
The difference between 77 and 51 is: 
The difference between 72 and 56 is: 