Mystery of Missing Money – 1 Rupee by Shakuntala Devi
Shakuntala Devi's missing money puzzle is a classic in mathematical logic. Two women sell marbles at different rates. When they…
Math
Mathematics Blog by Gaurav Tiwari. This section is dedicated to exploring various mathematical concepts and theories, transcending the boundaries of traditional high school and early college curriculums.
The mathematics topics here encompass various subfields, including algebra, calculus, number theory, geometry, topology, and more.
The Poincare Conjecture: The Problem That Made a Mathematician Refuse a Million Dollars
In 1904, Poincare asked: if every loop on a 3D shape can be shrunk to a point, must it be…
Derivative of x squared is 2x or x ? Where is the fallacy?
Here's a mathematical fallacy that trips up even sharp students. Can you prove that the derivative of x squared is…
Solving Ramanujan’s Puzzling Problem
Ramanujan's nested radical problem looks impossible at first glance. Infinitely many nested square roots, each multiplied by increasing integers. How…
20 Most Endangered Rivers in the World (2026)
20 rivers sustaining over 2.5 billion people are in serious trouble. Dam construction, pollution, over-extraction, and climate change are killing…