The difference between 50 and 29 is: 
The difference between 70 and 41 is: 
The difference between 59 and 29 is: 
The difference between 50 and 20 is: 
The difference between 90 and 29 is: 
The difference between 50 and 39 is: 
The difference between 54 and 23 is: 
The difference between 50 and 29 is: 