The difference between 77 and 61 is: 
The difference between 93 and 74 is: 
The difference between 75 and 61 is: 
The difference between 77 and 66 is: 
The difference between 87 and 61 is: 
The difference between 77 and 31 is: 
The difference between 85 and 69 is: 
The difference between 77 and 61 is: 