English
Number theory
Notes on divisibility, prime numbers, congruences, and the deeper structures behind integer arithmetic. Each piece breaks down a specific theorem, identity, or technique — from Euclidean algorithm fundamentals to modular arithmetic and its applications. The focus is on clear reasoning: why things work, not just how to apply them. A place to build solid intuition for one of mathematics’ oldest and most elegant branches.
Welcome back to the weekend puzzle section — because what could be better than spending a few minutes on a…
Not sure when you'll need this, but it's one of those things that sticks with you once you hear it.
Happy new school year! It turns out that the date itself hides two elegant mathematical facts — a prime number…
No, it still hasn't been proven. Nearly 170 years have passed — and the most remarkable thing isn't even the…
What could be better than a brain workout on a weekend? I spent some time on what seemed like a…
Today is the unofficial Mathematician's Day — congratulations to everyone!
We are looking for solutions in positive integers. The solution actually comes in two steps.