Ok, lets think about this. 20 - 5 = 15, right? After you think about that, do 15 + 1 = 16. Wait, ISNT THAT RIGHT?!? OMFG, yeah it is. So then, you do 16 - 4 = 12. Then you think about that, think please. OH YEAH, LET ME PUT DOWN 13 NOW! Yeah, you dumbass, you should think about the insults you...