The difference between 23 and 15 is: 
The difference between 80 and 74 is: 
The difference between 27 and 15 is: 
The difference between 23 and 11 is: 
The difference between 23 and 15 is: 
The difference between 23 and 15 is: 
The difference between 29 and 11 is: 
The difference between 23 and 15 is: 