The difference between 21 and 10 is: 
The difference between 35 and 23 is: 
The difference between 26 and 10 is: 
The difference between 21 and 10 is: 
The difference between 41 and 10 is: 
The difference between 21 and 10 is: 
The difference between 30 and 19 is: 
The difference between 21 and 10 is: 