The difference between 97 and 79 is: 
The difference between 35 and 17 is: 
The difference between 99 and 79 is: 
The difference between 97 and 75 is: 
The difference between 97 and 79 is: 
The difference between 97 and 19 is: 
The difference between 99 and 71 is: 
The difference between 97 and 79 is: 