The difference between 91 and 66 is: 
The difference between 99 and 30 is: 
The difference between 99 and 66 is: 
The difference between 91 and 60 is: 
The difference between 91 and 66 is: 
The difference between 91 and 76 is: 
The difference between 97 and 62 is: 
The difference between 91 and 66 is: 