
Math? Meh.
What else can we expect indeed - obviously 5 letters are just too much effort, rather like dividing 21 by 2 - come on, do you seriously think we are that innumerate that you need to help us out? Hardly rocket science is it?
Besides, no matter how stupid you are, the average bloke can count to 21 - 10 fingers, 10 toes and so on...