The difference between 29 and 23 is: 
The difference between 99 and 16 is: 
The difference between 29 and 23 is: 
The difference between 29 and 25 is: 
The difference between 69 and 23 is: 
The difference between 29 and 13 is: 
The difference between 33 and 27 is: 
The difference between 29 and 23 is: 