The difference between 29 and 27 is: 
The difference between 56 and 17 is: 
The difference between 28 and 27 is: 
The difference between 29 and 25 is: 
The difference between 79 and 27 is: 
The difference between 29 and 17 is: 
The difference between 30 and 28 is: 
The difference between 29 and 27 is: 