The difference between 93 and 13 is: 
The difference between 99 and 21 is: 
The difference between 98 and 13 is: 
The difference between 93 and 12 is: 
The difference between 53 and 13 is: 
The difference between 93 and 83 is: 
The difference between 97 and 19 is: 
The difference between 93 and 13 is: 