Ludi Mathematici
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Can you find the 3 Areas? 🟦🟧🟥
barry leung
1–2 minutesRead more: Can you find the 3 Areas? 🟦🟧🟥The figure above shows a unit square target for shooting on the rectangular coordinate plane. The target is divided into…
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Actually You Will Never Be Correct: A Tricky Question From MIT Puzzle Club
barry leung
1–2 minutesRead more: Actually You Will Never Be Correct: A Tricky Question From MIT Puzzle ClubI have seen this maths puzzle circulating on the internet for the umpteenth time. It gets a little boring at…
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You Roll These Dice. Which Outcome Is More Likely?
barry leung
1–2 minutesRead more: You Roll These Dice. Which Outcome Is More Likely?Either you roll a 12-sided fair die once. Either you roll a 6-sided fair die twice. So in which game…
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So Which Outcome Is More Likely? A or B? Or Both?
barry leung
1–2 minutesRead more: So Which Outcome Is More Likely? A or B? Or Both?Here’s a fun teaser for you. Consider the following scenarios: So can you tell me which outcome is more likely?…
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An American President’s Proof of The Pythagorean Theorem
barry leung
1–2 minutesRead more: An American President’s Proof of The Pythagorean TheoremUS President: James A Garfield As the 20th President of the United States in 1881, James Garfield came up with an…
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How Would YOU Find The Total Shaded Area?
barry leung
1–2 minutesRead more: How Would YOU Find The Total Shaded Area?This is another geometry puzzle by Catriona Agg on X. Both the regular hexagons have area 6. What’s the total…
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What Is The Area Of The Square?
barry leung
1–2 minutesRead more: What Is The Area Of The Square?The circle has a radius 1. The diagonal of the square extends to be a tangent of the circle. The…
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A Critique of The Dark Night of Mathematics by Kirwin Hampshire
barry leung
12–17 minutesRead more: A Critique of The Dark Night of Mathematics by Kirwin HampshireThe following is a Substack essay on the existential implications of AI for mathematics by Kirwin Hampshire. In this post…
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How Would You Tether Your Goat?
barry leung
4–7 minutesRead more: How Would You Tether Your Goat?A goat is tethered to the edge of a circular paddock, with a lead adjusted so that the goat can…
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A Maths Puzzle About Pirates Shooting In A Circle🏴☠️
barry leung
3–4 minutesRead more: A Maths Puzzle About Pirates Shooting In A Circle🏴☠️ Here’s a classic maths retold: 1,024 pirates stand shoulder to shoulder in a circle, numbered 1 through 1,024. On the…
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Let’s Look At This 2026 Maths Exam For Gifted Students In Iraq
barry leung
3–5 minutesRead more: Let’s Look At This 2026 Maths Exam For Gifted Students In IraqI was scrolling on Reddit today and came across this difficult maths exam from Iraqi High School for gifted students.…
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Can You Solve This Classic Geometry Puzzle?
barry leung
1–2 minutesRead more: Can You Solve This Classic Geometry Puzzle?I was browsing through Twitter and came across this very interesting problem by @Pratik Matematik. There are two ways to solve…
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Twin Stars: Deng Yu, Hong Wang, and the Proofs That Moved a Century-Old Mountain
barry leung
9–13 minutesRead more: Twin Stars: Deng Yu, Hong Wang, and the Proofs That Moved a Century-Old MountainOn July 23, 2026, at the International Congress of Mathematicians in Philadelphia, the Fields Medal went to four mathematicians. Two…
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How To Find The Arc Length And Its Surface Area?
barry leung
2–3 minutesRead more: How To Find The Arc Length And Its Surface Area?In this article, we will take a deep dive into the derivations of the arc length of a curve and…
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Do You Think You Can Study Maths At Oxford University?
barry leung
1–2 minutesRead more: Do You Think You Can Study Maths At Oxford University?The function f, defined for whole positive numbers, satisfies f(1) = 1 and also the following rules f(2n) = 2f(n)…
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A Classic Maths Puzzle: How Many Cats Are Needed?
barry leung
2–3 minutesRead more: A Classic Maths Puzzle: How Many Cats Are Needed?If three cats catch three rats in three minutes, how many cats will catch 100 rats in 100 minutes? I…
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Should You Roll Or Not?
barry leung
2–3 minutesRead more: Should You Roll Or Not?Two bullets are loaded into a gun’s round barrel consecutively. The barrel has a capacity of 6. The gun is…
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So How Does The Koch Snowflake Have Finite Area?
barry leung
2–3 minutesRead more: So How Does The Koch Snowflake Have Finite Area?Following part one of the series, we will now look at the area of a Koch snowflake starting with an equilateral triangle…
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What If Even Your Point of View Is Uncertain? Quantum Physics Says It Can Be.
barry leung
7–10 minutesRead more: What If Even Your Point of View Is Uncertain? Quantum Physics Says It Can Be.Picture yourself standing on a railway platform as a trolley rolls by. A young girl riding inside lets go of…
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Even A 6 Year-Old Kid Can Solve This In 7 Seconds. But Can You?
barry leung
1–2 minutesRead more: Even A 6 Year-Old Kid Can Solve This In 7 Seconds. But Can You?The area of a triangle is 1/2(b)(h), where b is the base and h is the height. What that means…
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How Does The Koch Snowflake Have Infinite Perimeter?
barry leung
2–3 minutesRead more: How Does The Koch Snowflake Have Infinite Perimeter?What is the perimeter of the above Koch snowflake starting from an equilateral triangle with side length 1? This is…
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Ⓒ 2026 MATH GAMES By Barry Leung, CoMN, KoMG, ARM