The difference between 36 and 15 is: 
The difference between 85 and 63 is: 
The difference between 37 and 15 is: 
The difference between 36 and 11 is: 
The difference between 86 and 15 is: 
The difference between 36 and 15 is: 
The difference between 40 and 19 is: 
The difference between 36 and 15 is: 