The difference between 77 and 49 is: 
The difference between 59 and 17 is: 
The difference between 79 and 49 is: 
The difference between 77 and 41 is: 
The difference between 97 and 49 is: 
The difference between 77 and 49 is: 
The difference between 79 and 41 is: 
The difference between 77 and 49 is: 