The difference between 23 and 23 is: 
The difference between 82 and 15 is: 
The difference between 26 and 23 is: 
The difference between 23 and 20 is: 
The difference between 43 and 23 is: 
The difference between 23 and 13 is: 
The difference between 21 and 25 is: 
The difference between 23 and 23 is: 