The difference between 77 and 72 is: 
The difference between 29 and 17 is: 
The difference between 74 and 72 is: 
The difference between 77 and 70 is: 
The difference between 97 and 72 is: 
The difference between 77 and 62 is: 
The difference between 81 and 76 is: 
The difference between 77 and 72 is: 