mathcounts notes

The problems below are much easier so if you are preparing for the state, try the online timed test here . Just write down random name to e...

For Mathcounts advanced group -- harder  Mathcounts State/National problem on 3-D geometry.                       From Mathcounts Mini : ...

Part I work for this week: See if you can write proof to show the exterior angle of any regular convex polygon is \(\frac{360}{n}\). I...

Venn Diagram explained from AoPS : learn the two set and three set examples Principle of Inclusion-Exclusion from AoPS : again, two set a...

First, review target level questions you got wrong last week and practice counting systematically. Right triangle inscribed in a circle pr...