The difference between 67 and 23 is: 
The difference between 72 and 55 is: 
The difference between 64 and 23 is: 
The difference between 67 and 22 is: 
The difference between 77 and 23 is: 
The difference between 67 and 33 is: 
The difference between 72 and 28 is: 
The difference between 67 and 23 is: 