The difference between 29 and 17 is: 
The difference between 90 and 44 is: 
The difference between 28 and 17 is: 
The difference between 29 and 15 is: 
The difference between 79 and 17 is: 
The difference between 29 and 17 is: 
The difference between 30 and 18 is: 
The difference between 29 and 17 is: 