The difference between 26 and 18 is: 
The difference between 35 and 15 is: 
The difference between 29 and 18 is: 
The difference between 26 and 10 is: 
The difference between 26 and 18 is: 
The difference between 26 and 18 is: 
The difference between 29 and 11 is: 
The difference between 26 and 18 is: 