A Brain teaser is a type of puzzle which requires thinking and logical skills. In these types of puzzles, even math riddles are a type of puzzle in which puzzles are in numerical form. These maths ...

Jeff Smith's Math Puzzle for August 21, 2026 – Eratosthenes the Cyrene, geographer, chief librarian of the Library of ...

Meet Tom, a seasoned voyager in the realm of RPGs and MMORPGs, where the virtual landscapes of games like Final Fantasy 14 are his domain. With an impressive track record spanning nine years as a ...

Here, count with me: 1, 2, 3, 4, 5, 6, 7, 8, 9, T, 11, 12 … Oh, what’s that? You write ten with “zero”? Fair enough. Zero, we have been told, is the ...

A graphic artist is testing everyone’s knowledge of the mathematical order of operations with a string of numbers and missing arithmetic symbols. Gergely Dudás, of Budapest, Hungary, shared the new ...

One string in each of the following pairs can be unraveled into a circle—the so-­called unknot. Which one is it? Show puzzle solution The knots at the top left and the bottom right can be unraveled ...

At 6 A.M. or P.M. (it doesn’t matter which), a clock’s minute hand and hour hand point in opposite directions, forming a straight line across the clockface. When is the next time this will happen?