The difference between 67 and 42 is: 
The difference between 51 and 46 is: 
The difference between 64 and 42 is: 
The difference between 67 and 40 is: 
The difference between 57 and 42 is: 
The difference between 67 and 12 is: 
The difference between 72 and 47 is: 
The difference between 67 and 42 is: 