The difference between 65 and 15 is: 
The difference between 73 and 20 is: 
The difference between 67 and 15 is: 
The difference between 65 and 11 is: 
The difference between 45 and 15 is: 
The difference between 65 and 35 is: 
The difference between 67 and 19 is: 
The difference between 65 and 15 is: 