The difference between 89 and 63 is: 
The difference between 78 and 66 is: 
The difference between 84 and 63 is: 
The difference between 89 and 66 is: 
The difference between 99 and 63 is: 
The difference between 89 and 63 is: 
The difference between 93 and 67 is: 
The difference between 89 and 63 is: 