The difference between 63 and 61 is: 
The difference between 89 and 41 is: 
The difference between 67 and 61 is: 
The difference between 63 and 62 is: 
The difference between 83 and 61 is: 
The difference between 63 and 21 is: 
The difference between 70 and 68 is: 
The difference between 63 and 61 is: 