The difference between 52 and 21 is: 
The difference between 93 and 33 is: 
The difference between 53 and 21 is: 
The difference between 52 and 21 is: 
The difference between 52 and 21 is: 
The difference between 52 and 11 is: 
The difference between 60 and 29 is: 
The difference between 52 and 21 is: 