The difference between 49 and 39 is: 
The difference between 17 and 13 is: 
The difference between 49 and 39 is: 
The difference between 49 and 33 is: 
The difference between 59 and 39 is: 
The difference between 49 and 29 is: 
The difference between 46 and 37 is: 
The difference between 49 and 39 is: 