The difference between 91 and 41 is: 
The difference between 99 and 29 is: 
The difference between 92 and 41 is: 
The difference between 91 and 40 is: 
The difference between 91 and 41 is: 
The difference between 91 and 11 is: 
The difference between 93 and 48 is: 
The difference between 91 and 41 is: 