The difference between 99 and 67 is: 
The difference between 79 and 64 is: 
The difference between 99 and 67 is: 
The difference between 99 and 60 is: 
The difference between 79 and 67 is: 
The difference between 99 and 37 is: 
The difference between 101 and 69 is: 
The difference between 99 and 67 is: 