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Nice Math Problems
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Can These Cubics Have Integer Roots Only? (Indian Math Olympiad)
Can These Cubics Have Integer Roots Only? (Indian Math Olympiad)
Here is a really nice algebra problem from the 2021 Indian National Math Olympiad.
Russell Lim
Jan 7
Want a Challenge ?— Try This Overlapping Rectangles Problem
Want a Challenge ?— Try This Overlapping Rectangles Problem
Find the Largest Number of Squares than CANNOT be Covered
Russell Lim
Dec 14, 2024
Simple Sequence Stumps the World’s Best (IMO 2024 Problem 3)
Simple Sequence Stumps the World’s Best (IMO 2024 Problem 3)
Here’s a nice way to understand it 🥰
Russell Lim
Aug 5, 2024
IMO 2024 Problem 1 — “Explain it Like I’m 12”
IMO 2024 Problem 1 — “Explain it Like I’m 12”
An Olympiad Algebra problem explained with only 7th Grade Algebra …
Russell Lim
Jul 23, 2024
IMO 2024 — USA Wins! China 2nd, Korea 3rd.
IMO 2024 — USA Wins! China 2nd, Korea 3rd.
Plus a Fairytale 4th Place for India
Russell Lim
Jul 20, 2024
A Tricky Complex Numbers Proof
A Tricky Complex Numbers Proof
But easy when you know how!
Russell Lim
Jul 3, 2024
Yes High School Math in China is Hard!🧨
Yes High School Math in China is Hard!🧨
Here is the final problem from the 2024 Gao Kao Math Paper
Russell Lim
Jun 13, 2024
Pythagoras Would Have Loved This Pyramid Theorem! 🥰
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…
Russell Lim
Jun 6, 2024
Slicing a Cube With 8 Planes
Slicing a Cube With 8 Planes
is *not* so simple to visualize!
Russell Lim
May 18, 2024
Can You Tell the Time on This Clock?
Can You Tell the Time on This Clock?
This clock is ambiguous — or is it?
Russell Lim
Apr 26, 2024
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