# This Mathematical Riddle Explains All We Know of the Father of Algebra

Diophantes was a Hellenistic Greek mathematician who lived around 200 AD. His claim to fame comes from substituting symbols for numbers and operations in equations, thus creating algebra, but everything else we know about his life comes from a single algebraic riddle.

# Can You Solve the Math Problem That Has Torn Singapore Apart?

A question on a quiz for teenage mathletes proved so tricky for Singapore newscaster Kenneth Kong that he posted it to Facebook to find a definitive answer. Now the problem has driven the entire country mad, and it's spreading to the rest of the world.

# The Disturbing Puzzle Game That Nobody Can Solve

On July 10th, 2014, a small, mysterious game called "Do Not Believe His Lies" was uploaded to the iOS app store. Since then, over 40,000 people have downloaded the app. Nobody has beaten it. Hell, nobody quite knows what it is, either.

Then, the game throws you its first riddle: The first puzzle stumped me for a…

# How To: Win Impressively At Gameshows Using Simple Maths

Here's a fun clip from BBC Two's collegiate quiz show University Challenge. Host Jeremy Paxman asks the contestants what day of the week it will be 100 days after Monday. A player named Binnie responds quickly: "Wednesday." Paxman's face contorts. "How did you know that?" he asks, astonished.

# Can You Figure Out This Parking Lot's Numbering System?

Can you explain the numbering system in this parking lot? Like most good riddles, there are several clues hiding in plain sight, and the answer, once you see it, is clear as day. (And, if you're like me, you'll wonder why it didn't dawn on you sooner.)