The difference between 99 and 78 is: 
The difference between 64 and 41 is: 
The difference between 99 and 78 is: 
The difference between 99 and 76 is: 
The difference between 99 and 78 is: 
The difference between 99 and 28 is: 
The difference between 100 and 79 is: 
The difference between 99 and 78 is: 