The difference between 77 and 10 is: 
The difference between 49 and 38 is: 
The difference between 77 and 10 is: 
The difference between 77 and 12 is: 
The difference between 77 and 10 is: 
The difference between 77 and 20 is: 
The difference between 86 and 19 is: 
The difference between 77 and 10 is: 