The difference between 39 and 13 is: 
The difference between 94 and 86 is: 
The difference between 34 and 13 is: 
The difference between 39 and 17 is: 
The difference between 39 and 13 is: 
The difference between 39 and 23 is: 
The difference between 40 and 14 is: 
The difference between 39 and 13 is: 