The difference between 72 and 29 is: 
The difference between 86 and 17 is: 
The difference between 79 and 29 is: 
The difference between 72 and 21 is: 
The difference between 72 and 29 is: 
The difference between 72 and 49 is: 
The difference between 75 and 22 is: 
The difference between 72 and 29 is: 