The difference between 23 and 12 is: 
The difference between 85 and 79 is: 
The difference between 24 and 12 is: 
The difference between 23 and 12 is: 
The difference between 63 and 12 is: 
The difference between 23 and 12 is: 
The difference between 30 and 19 is: 
The difference between 23 and 12 is: 