The difference between 27 and 26 is: 
The difference between 68 and 21 is: 
The difference between 29 and 26 is: 
The difference between 27 and 22 is: 
The difference between 57 and 26 is: 
The difference between 27 and 16 is: 
The difference between 30 and 29 is: 
The difference between 27 and 26 is: 