The difference between 90 and 67 is: 
The difference between 87 and 54 is: 
The difference between 98 and 67 is: 
The difference between 90 and 60 is: 
The difference between 90 and 67 is: 
The difference between 90 and 57 is: 
The difference between 96 and 63 is: 
The difference between 90 and 67 is: 