The difference between 17 and 16 is: 
The difference between 61 and 23 is: 
The difference between 18 and 16 is: 
The difference between 17 and 10 is: 
The difference between 47 and 16 is: 
The difference between 17 and 16 is: 
The difference between 20 and 19 is: 
The difference between 17 and 16 is: 