The difference between 93 and 68 is: 
The difference between 64 and 20 is: 
The difference between 99 and 68 is: 
The difference between 93 and 60 is: 
The difference between 93 and 68 is: 
The difference between 93 and 18 is: 
The difference between 98 and 63 is: 
The difference between 93 and 68 is: 