The difference between 20 and 10 is: 
The difference between 93 and 28 is: 
The difference between 28 and 10 is: 
The difference between 20 and 10 is: 
The difference between 90 and 10 is: 
The difference between 20 and 10 is: 
The difference between 20 and 11 is: 
The difference between 20 and 10 is: 