The difference between 65 and 57 is: 
The difference between 50 and 15 is: 
The difference between 68 and 57 is: 
The difference between 65 and 53 is: 
The difference between 85 and 57 is: 
The difference between 65 and 17 is: 
The difference between 69 and 51 is: 
The difference between 65 and 57 is: 