The difference between 63 and 39 is: 
The difference between 31 and 24 is: 
The difference between 69 and 39 is: 
The difference between 63 and 30 is: 
The difference between 73 and 39 is: 
The difference between 63 and 19 is: 
The difference between 68 and 34 is: 
The difference between 63 and 39 is: 