The difference between 91 and 29 is: 
The difference between 60 and 45 is: 
The difference between 99 and 29 is: 
The difference between 91 and 20 is: 
The difference between 61 and 29 is: 
The difference between 91 and 29 is: 
The difference between 94 and 22 is: 
The difference between 91 and 29 is: 