The difference between 72 and 55 is: 
The difference between 92 and 57 is: 
The difference between 79 and 55 is: 
The difference between 72 and 50 is: 
The difference between 92 and 55 is: 
The difference between 72 and 65 is: 
The difference between 79 and 52 is: 
The difference between 72 and 55 is: 