The difference between 72 and 68 is: 
The difference between 71 and 38 is: 
The difference between 79 and 68 is: 
The difference between 72 and 60 is: 
The difference between 72 and 68 is: 
The difference between 72 and 18 is: 
The difference between 79 and 65 is: 
The difference between 72 and 68 is: 