The difference between 79 and 77 is: 
The difference between 89 and 62 is: 
The difference between 78 and 77 is: 
The difference between 79 and 75 is: 
The difference between 99 and 77 is: 
The difference between 79 and 27 is: 
The difference between 81 and 79 is: 
The difference between 79 and 77 is: 