Russell Lim – Medium

Russell Lim

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Nice Math Problems

Simple Sequence Stumps the World’s Best (IMO 2024 Problem 3)

Here’s a nice way to understand it 🥰

Aug 6

Simple Sequence Stumps the World’s Best (IMO 2024 Problem 3)

Aug 6

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Cantor’s Paradise

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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Cantor’s Paradise

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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Nice Math Problems

Want a Challenge ?— Try This Overlapping Rectangles Problem

Find the Largest Number of Squares than CANNOT be Covered

Dec 15

Want a Challenge ?— Try This Overlapping Rectangles Problem

Dec 15

Published in
Nice Math Problems

IMO 2024 Problem 1 — “Explain it Like I’m 12”

An Olympiad Algebra problem explained with only 7th Grade Algebra …

Jul 23

IMO 2024 Problem 1 — “Explain it Like I’m 12”

Jul 23

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Nice Math Problems

IMO 2024 — USA Wins! China 2nd, Korea 3rd.

Plus a Fairytale 4th Place for India

Jul 20

IMO 2024 — USA Wins! China 2nd, Korea 3rd.

Jul 20

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Cantor’s Paradise

Girls Make History in 2024 Math Olympiad Team

The 2024 IMO (International Mathematics Olympiad) is happening soon! It will take place in Bath, England, between July 12th and 18th.

Jul 10

Girls Make History in 2024 Math Olympiad Team

Jul 10

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Nice Math Problems

A Tricky Complex Numbers Proof

But easy when you know how!

Jul 3

A Tricky Complex Numbers Proof

Jul 3

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Nice Math Problems

Yes High School Math in China is Hard!🧨

Here is the final problem from the 2024 Gao Kao Math Paper

Jun 14

Yes High School Math in China is Hard!🧨

Jun 14

Published in
Nice Math Problems

Pythagoras Would Have Loved This Pyramid Theorem! 🥰

A pyramid is constructed by gluing together three right triangles with areas A, B, and C, so that the hypotenuses form a triangular base of…

Jun 6

A² + B² + C² = D²: in a right-angled tetrahedron the sum of squares of areas of three sides meeting at the right angle is the sum of the square of the area of the remaining side

Jun 6

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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