The difference between 64 and 50 is: 
The difference between 89 and 85 is: 
The difference between 61 and 50 is: 
The difference between 64 and 51 is: 
The difference between 64 and 50 is: 
The difference between 64 and 40 is: 
The difference between 70 and 56 is: 
The difference between 64 and 50 is: 