The difference between 85 and 61 is: 
The difference between 54 and 31 is: 
The difference between 87 and 61 is: 
The difference between 85 and 64 is: 
The difference between 85 and 61 is: 
The difference between 85 and 11 is: 
The difference between 90 and 66 is: 
The difference between 85 and 61 is: 