The difference between 73 and 21 is: 
The difference between 59 and 22 is: 
The difference between 77 and 21 is: 
The difference between 73 and 21 is: 
The difference between 83 and 21 is: 
The difference between 73 and 11 is: 
The difference between 81 and 29 is: 
The difference between 73 and 21 is: 