The difference between 66 and 52 is: 
The difference between 81 and 77 is: 
The difference between 67 and 52 is: 
The difference between 66 and 50 is: 
The difference between 96 and 52 is: 
The difference between 66 and 32 is: 
The difference between 73 and 59 is: 
The difference between 66 and 52 is: 