13 Ways of Looking at the Number 13

November 9, 2021

Hitting All the Marks: Exploring New Bounds for Sparse Rulers and a Wolfram Language Proof

February 12, 2020

Shattering the Plane with Twelve New Substitution Tilings Using 2, φ, ψ, χ, ρ

March 7, 2019

Cultivating New Solutions for the Orchard-Planting Problem

February 2, 2018

In Defense of Infinity

September 10, 2015

Biggest Little Polyhedron—New Solutions in Combinatorial Geometry

May 20, 2015

Martin Gardner’s 100th Birthday

October 21, 2014

From Close to Perfect—A Triangle Problem

March 28, 2013

The Legacy of TRON

December 14, 2010

How to Win at Coin Flipping

November 30, 2010

Benoît Mandelbrot

October 21, 2010

Celebration of Mind

October 14, 2010

Happy Vampire Day

October 5, 2010

Let’s Do It Again

September 29, 2010

Tetrahedra Packing

August 30, 2010

Nine Cool Points on the Complex Plane

August 6, 2010

Sicherman Dice

July 13, 2010

The Circles of Descartes

June 16, 2010

Remembering Martin Gardner

May 27, 2010

9–9–9

September 9, 2009

Are You a Math Genius?

February 24, 2009

Word Play with Mathematica

July 25, 2008

Flag Day

June 14, 2008

NUMB3RS Season 4 Wrap

May 16, 2008

Friends, Earthlings, ETs—Lend Me Your Sensory Organs!

March 19, 2008

Pi Day

March 13, 2008

16 Puzzles for International Puzzle Day

January 29, 2008