The difference between 64 and 35 is: 
The difference between 78 and 65 is: 
The difference between 66 and 35 is: 
The difference between 64 and 30 is: 
The difference between 44 and 35 is: 
The difference between 64 and 15 is: 
The difference between 69 and 30 is: 
The difference between 64 and 35 is: 