Russell Lim – Medium

Russell Lim

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The Greatest Mathematicians — A Data Visualisation

Our modern society is built upon mathematics. And mathematics is built upon the achievements of thousands of outstanding individuals…

Jun 18, 2022

The most influential mathematicians — a data visualisation.

Jun 18, 2022

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Least Squares vs Least Absolute Errors —A 250-Year-Old Debate

From Gauss and the birth of statistics to modern data science and machine learning

May 8, 2022

Scatterplot with least squares regression line and least absolute value regression line. Background image is brain and computer chip, symbolising artificial intelligence.

May 8, 2022

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What Fraction is Shaded? 🤔

AMC 2025 — Equilateral triangles in a rectangle

Aug 17

What Fraction is Shaded? 🤔

Aug 17

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Beijing High School Math — Prove (3,4)-Knight’s Tour is Impossible! 😅

2025 Beijing Gao Kao (High School Exam) — Final Problem

Aug 3

Beijing High School Math — Prove (3,4)-Knight’s Tour is Impossible! 😅

Aug 3

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Want to see a Fields Medalist Tackle Unseen Math Problems?

Timothy Gowers takes on the 2025 IMO

Jul 31

Want to see a Fields Medalist Tackle Unseen Math Problems?

Jul 31

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IMO 2025 Problem 4

Classic Number Theory with a Surprising Solution!

Jul 27

IMO 2025 Problem 4

Jul 27

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IMO 2025 Results — Humans Still Rule! 💪

1. China, 2. USA, 3. Korea …. AI models not even close!

Jul 19

IMO 2025 Results — Humans Still Rule! 💪

Jul 19

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IMO 2025 Problem 1 — Primary School Version 🎨

Let’s take an International Math Olympiad problem and make it accessible to primary students

Jul 18

2025 international math olympiad problem 1 was about lines in a plane covering points on a grid. this image shows some examples.

Jul 18

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Gaokao 2025 — Ping Pong Probability! 🏓

Challenge yourself with a nice probability problem from the Chinese High School Exams

Jul 5

Gaokao 2025 — Ping Pong Probability! 🏓

Jul 5

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IMO 2025— Will AI Finally Win Gold?

International Math Olympiad — The Battle Begins

Jun 29

IMO 2025— Will AI Finally Win Gold?

Jun 29

Russell Lim

Russell Lim

I teach high school mathematics in Melbourne, Australia. I like thinking about interesting problems and learning new things.

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