The difference between 97 and 18 is: 
The difference between 85 and 46 is: 
The difference between 99 and 18 is: 
The difference between 97 and 13 is: 
The difference between 77 and 18 is: 
The difference between 97 and 68 is: 
The difference between 99 and 10 is: 
The difference between 97 and 18 is: 