The difference between 84 and 15 is: 
The difference between 68 and 10 is: 
The difference between 89 and 15 is: 
The difference between 84 and 12 is: 
The difference between 64 and 15 is: 
The difference between 84 and 35 is: 
The difference between 89 and 10 is: 
The difference between 84 and 15 is: 