The difference between 64 and 57 is: 
The difference between 67 and 23 is: 
The difference between 69 and 57 is: 
The difference between 64 and 52 is: 
The difference between 64 and 57 is: 
The difference between 64 and 27 is: 
The difference between 68 and 51 is: 
The difference between 64 and 57 is: 