The difference between 18 and 11 is: 
The difference between 67 and 41 is: 
The difference between 15 and 11 is: 
The difference between 18 and 14 is: 
The difference between 68 and 11 is: 
The difference between 18 and 11 is: 
The difference between 25 and 18 is: 
The difference between 18 and 11 is: 