The difference between 29 and 28 is: 
The difference between 81 and 26 is: 
The difference between 29 and 28 is: 
The difference between 29 and 25 is: 
The difference between 59 and 28 is: 
The difference between 29 and 18 is: 
The difference between 30 and 29 is: 
The difference between 29 and 28 is: 