The best 3D brain teaser puzzles require logic and spatial awareness to make an exciting game of skill. From Kanoodle to Hanayama, here are the good ones.

What's the secret to winning arguments in a world of divisive politics? According to the author of The Art of Logic in an Illogical World, the answer is math.

Math logic is a consistent, precise, and unfailingly accurate system. There is no guesswork and no ambiguity. This logical foundation is the key to the obvious magic of math.

California’s proposed new math curriculum defies logic A student take notes during his algebra class at McAuliffe Middle School in Los Alamitos on Wednesday, September 27, 2017.

This paper is an edited form of a letter written by the two authors (in the name of Tarski) to Wolfram Schwabhäuser around 1978. It contains extended remarks about Tarski's system of foundations for ...