The difference between 42 and 29 is: 
The difference between 87 and 23 is: 
The difference between 49 and 29 is: 
The difference between 42 and 20 is: 
The difference between 52 and 29 is: 
The difference between 42 and 39 is: 
The difference between 48 and 25 is: 
The difference between 42 and 29 is: 