The difference between 84 and 77 is: 
The difference between 66 and 19 is: 
The difference between 89 and 77 is: 
The difference between 84 and 70 is: 
The difference between 84 and 77 is: 
The difference between 84 and 37 is: 
The difference between 88 and 71 is: 
The difference between 84 and 77 is: 