why does math exist ?kmk

There are countless reasons why math exists. It's the key to how life functions.

This video perfectly explains why math exists: https://www.pbs.org/wgbh/nova/video/the-great-math-mystery#.Vx0zZeAY4jM.email

Some say that we are living in a simulation...

 

and that is why EVERYTHING works in a mathematical way.

 

If math did not exist, it would be necessary to invent it.  

QED

I'm among the many that believe math exists outside of any physical reality.

 

If you want a very interesting take on things read the story "Luminous" by Greg Egan.