These 38 Basic Math Problems Look Easy, Until You Try To Solve Them – Test Yourself

Let’s keep things simple - this is basic math. Nothing scary. Just everyday calculations, a bit of geometry, some number ...
Ars Technica

Where can I get a list of basic math formula?

Ok, there has to be somewhere online that has a nice list of basic math equations, like how to find the area of a circle, how to find the perimeter of a triangle, etc, etc, etc, all that basic ...