The difference between 68 and 68 is: 
The difference between 97 and 49 is: 
The difference between 69 and 68 is: 
The difference between 68 and 63 is: 
The difference between 78 and 68 is: 
The difference between 68 and 28 is: 
The difference between 61 and 62 is: 
The difference between 68 and 68 is: 