The difference between 94 and 68 is: 
The difference between 31 and 19 is: 
The difference between 99 and 68 is: 
The difference between 94 and 61 is: 
The difference between 84 and 68 is: 
The difference between 94 and 78 is: 
The difference between 97 and 61 is: 
The difference between 94 and 68 is: 