The difference between 33 and 29 is: 
The difference between 61 and 30 is: 
The difference between 39 and 29 is: 
The difference between 33 and 20 is: 
The difference between 83 and 29 is: 
The difference between 33 and 19 is: 
The difference between 39 and 25 is: 
The difference between 33 and 29 is: 