The difference between 73 and 63 is: 
The difference between 47 and 39 is: 
The difference between 79 and 63 is: 
The difference between 73 and 61 is: 
The difference between 73 and 63 is: 
The difference between 73 and 23 is: 
The difference between 70 and 61 is: 
The difference between 73 and 63 is: 