The difference between 41 and 29 is: 
The difference between 88 and 12 is: 
The difference between 49 and 29 is: 
The difference between 41 and 20 is: 
The difference between 81 and 29 is: 
The difference between 41 and 29 is: 
The difference between 43 and 21 is: 
The difference between 41 and 29 is: 