The difference between 53 and 21 is: 
The difference between 25 and 10 is: 
The difference between 55 and 21 is: 
The difference between 53 and 22 is: 
The difference between 73 and 21 is: 
The difference between 53 and 31 is: 
The difference between 61 and 29 is: 
The difference between 53 and 21 is: 