The difference between 77 and 73 is: 
The difference between 79 and 48 is: 
The difference between 79 and 73 is: 
The difference between 77 and 74 is: 
The difference between 87 and 73 is: 
The difference between 77 and 63 is: 
The difference between 81 and 77 is: 
The difference between 77 and 73 is: 