The difference between 81 and 65 is: 
The difference between 69 and 43 is: 
The difference between 88 and 65 is: 
The difference between 81 and 60 is: 
The difference between 71 and 65 is: 
The difference between 81 and 15 is: 
The difference between 89 and 63 is: 
The difference between 81 and 65 is: 