Im confused...

To make school longer and even worse. That is why.

So that Chuck Norris could keep track of how many people he killed and-
*shot down for using a Chuck Norris joke*
...

There had to be some reason at some point.

So we're able to live in houses that aren't constantly toppling to the ground. So we might one दिन develop a cure for cancer. So that an artist can convey संगीत is a way that can be shared with others. आप know, insignificant stuff like that.

Without math, the world would be a fucked up place where no one knew how big that flat screen TV was.
*points to flat screen TV*

So that we learn how to....wait....CLOUD!

they invented it because they were traders ,they want to caculate everything , i'm not at school any way ,to me it was fun

Because i कहा so! Now drop down and give me 8!
Push-ups. ._.