The difference between 94 and 15 is: 
The difference between 68 and 25 is: 
The difference between 99 and 15 is: 
The difference between 94 and 13 is: 
The difference between 64 and 15 is: 
The difference between 94 and 35 is: 
The difference between 99 and 10 is: 
The difference between 94 and 15 is: 