The difference between 87 and 68 is: 
The difference between 37 and 29 is: 
The difference between 89 and 68 is: 
The difference between 87 and 65 is: 
The difference between 97 and 68 is: 
The difference between 87 and 68 is: 
The difference between 89 and 60 is: 
The difference between 87 and 68 is: 