Ludi Mathematici
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Are You Smart Enough To Find A + H?
barry leung
1–2 minutesRead more: Are You Smart Enough To Find A + H?Come not between the dragon and his wrath. Apparently this is a quote from Shakespeare, and I happened to have…
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An Algebra Puzzle
barry leung
1–2 minutesRead more: An Algebra PuzzleThere are many ways one can solve this. It all boils down to what sort of techniques you are most…
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Can You Count Them All?
barry leung
1–2 minutesRead more: Can You Count Them All?So we have a star, a mountain and another shape today. Our job is to carefully count all the triangles…
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Happy Valentine’s Day: Can You Maximize The Love On This Day?
barry leung
1–2 minutesRead more: Happy Valentine’s Day: Can You Maximize The Love On This Day?Happy Valentine’s Day everyone, I hope you are having a euphoric moment, but if not, you can try this algebra…
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A Geometry Puzzle: What’s OC?
barry leung
1–2 minutesRead more: A Geometry Puzzle: What’s OC?Honestly please share your approach to this one in the comments below because there are at least 7 different ways…
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What Day Of The Week Is It?
barry leung
1–2 minutesRead more: What Day Of The Week Is It?As a kid, I used to hear stories of child prodigies being able to figure out what day of the…
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A Cambridge University Admission Question
barry leung
1–2 minutesRead more: A Cambridge University Admission QuestionThis is question 4 from the Test of Mathematics for University Admission practice paper by the University of Cambridge. The…
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Will Homer Simpson Get His Own Seat?
barry leung
1–2 minutesRead more: Will Homer Simpson Get His Own Seat?A line of 100 airline passengers is waiting to board a plane. They each hold a ticket to one of…
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Can You Outsmart Jane Street’s Tic Tac Toe Bot?
barry leung
1–2 minutesRead more: Can You Outsmart Jane Street’s Tic Tac Toe Bot?I found this nice brain teaser from Jane Street’s Puzzles, it’s about you playing against an imperfect computer program in…
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Can You Find All Possible Solutions In Both Cases?
barry leung
1–2 minutesRead more: Can You Find All Possible Solutions In Both Cases?Apparently a version of this puzzle appeared in ‘Nouvelles Annales de Mathématiques’. So we want to arrange the nine digits…
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Can You Find The Number Below 400? This question took me less than a minute!
barry leung
1–2 minutesRead more: Can You Find The Number Below 400? This question took me less than a minute!This math puzzle is about a pyramid made up of consecutive integers starting from 1. So on the first row,…
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Can You Solve This Oxford University Math Challenge?
barry leung
1–2 minutesRead more: Can You Solve This Oxford University Math Challenge?This algebra challenge comes from the 1997 Oxford University’s Entrance Exam. And to be honest, any student with a good…
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An Oxford MAT Question from 1997
barry leung
1–2 minutesRead more: An Oxford MAT Question from 1997This is honestly one of the best puzzles for students and anyone looking to test their understanding of calculus. It…
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So What’s The Most Number of Hats You Can Make?
barry leung
1–2 minutesRead more: So What’s The Most Number of Hats You Can Make?You are making clown hats from a circular piece of cardboard. The circumference of the base of each hat equals…
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Which One Is The Smallest?
barry leung
1–2 minutesRead more: Which One Is The Smallest?In school, we learn that a surd is an expression containing an irrational root, such as √11, √2, √5. They…
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Can You Find The Total Length Of The Border Of The Cyan Design?
barry leung
1–2 minutesRead more: Can You Find The Total Length Of The Border Of The Cyan Design?The shaded figure is formed by eight circular arcs of equal radius. Four arcs are centered at the vertices of…
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Ⓒ 2026 MATH GAMES By Barry Leung, CoMN, KoMG, ARM