The difference between 42 and 13 is: 
The difference between 85 and 24 is: 
The difference between 47 and 13 is: 
The difference between 42 and 11 is: 
The difference between 72 and 13 is: 
The difference between 42 and 33 is: 
The difference between 49 and 10 is: 
The difference between 42 and 13 is: 