The difference between 25 and 13 is: 
The difference between 38 and 30 is: 
The difference between 29 and 13 is: 
The difference between 25 and 11 is: 
The difference between 25 and 13 is: 
The difference between 25 and 13 is: 
The difference between 30 and 18 is: 
The difference between 25 and 13 is: 