The difference between 38 and 25 is: 
The difference between 77 and 15 is: 
The difference between 39 and 25 is: 
The difference between 38 and 20 is: 
The difference between 68 and 25 is: 
The difference between 38 and 15 is: 
The difference between 42 and 29 is: 
The difference between 38 and 25 is: 