The difference between 97 and 23 is: 
The difference between 89 and 78 is: 
The difference between 99 and 23 is: 
The difference between 97 and 23 is: 
The difference between 87 and 23 is: 
The difference between 97 and 13 is: 
The difference between 102 and 28 is: 
The difference between 97 and 23 is: 