Can You Tell the Time on This Clock?

This clock is ambiguous — or is it?

Hard (But Nice!) Australian Calculus Exam Question

About the function f(x) = n^x − x^n

Do You Really Know What the ‘N’ Stands For?

Understanding the Infamous P vs NP Problem

A Probability Challenge

This multiple-choice question baffled almost all the high school students…

This High School Geometry Problem has a Simple Solution (it’s just hard to find!)

Let ABCD be a…

A Quick Algebra Problem from the 2022 Oxford Maths Admission Test

How many solutions does this…

Given f(f(x)) = x² − x + 1, can you find f(0)?

Surprisingly, the answer is yes…

A Nice Algebra Problem from the 2023 China Math Olympiad

The Chinese IMO team eat sequences like this…

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

Plus a Fairytale 4th Place for India

Can You Beat GPT-4 by Solving This Logic Puzzle?

Go on, outsmart the AI while you still can!