The difference between 64 and 33 is: 
The difference between 69 and 67 is: 
The difference between 68 and 33 is: 
The difference between 64 and 33 is: 
The difference between 54 and 33 is: 
The difference between 64 and 13 is: 
The difference between 70 and 39 is: 
The difference between 64 and 33 is: 