The difference between 89 and 68 is: 
The difference between 71 and 67 is: 
The difference between 89 and 68 is: 
The difference between 89 and 64 is: 
The difference between 79 and 68 is: 
The difference between 89 and 68 is: 
The difference between 90 and 69 is: 
The difference between 89 and 68 is: 