The difference between 91 and 36 is: 
The difference between 98 and 25 is: 
The difference between 99 and 36 is: 
The difference between 91 and 30 is: 
The difference between 81 and 36 is: 
The difference between 91 and 46 is: 
The difference between 99 and 34 is: 
The difference between 91 and 36 is: 