Welcome to The Riddler. Every week, I offer up problems related to the things we hold dear around here: math, logic and probability. There are two types: Riddler Express for those of you who want ...

This tip for improving your SAT score was provided by Jake Davidson at Veritas Prep. Geometry is one of the toughest subconcepts of the SAT math section for students to master. There are a few reasons ...

Everyone learns the number one rule about triangles in high school: the angles of a triangle add up to 180 degrees. But did you know that sometimes they don't? Triangles are much more interesting than ...