Resources & Insights

The latest olympiad news, analysis and resources.

Solved Count Was Not Enough: How Maths Rating Works

Maths Rating is now live on Problems.cc. Here is the method behind problem strength, rating changes, provisional status and the new leaderboards.

George Ionitsa·27 July 2026

Read article

Mathematics6 min read

How We Helped IMO Digitalise Its Problems

How we digitalised every IMO paper from 1959 to 2026 onto problems.cc, turning decades of PDF downloads into structured statements our olympiad students can practise on.

George Ionitsa·17 July 2026

Mathematics6 min read

Ranking Pokémon on Three Axes: A Model We Built in Class

We ranked 1,350 Pokémon with a transparent three-axis model built in class — attack power, toughness, and speed — and walked through every step with Bulbasaur.

George Ionitsa·29 June 2026

Mathematics3 min read

JMO 2026 Results at Exact Science: 3 Golds, 3 Silvers, 2 Bronzes

Exact Science's JMO 2026 results: 13 students sat, 8 medals earned, and how clustered proof practice on problems.cc shaped preparation for a fully written olympiad paper.

George Ionitsa·29 June 2026

Mathematics6 min read

How High Can You Count on Your Hands?

A group lesson question — ten fingers, ten numbers? — turned into combinatorics: binary fingers, palm/back orientation, crossed hands, and why independence multiplies the space.

George Ionitsa·17 June 2026

Mathematics8 min read

How We Clustered JMO Written Problems Into Practice Sets

How we reviewed 125+ JMO written problems, clustered them by reasoning habit, and built six diagnostic practice sets on problems.cc — a maths education lab case study.

George Ionitsa·31 May 2026

Mathematics5 min read

What "Adaptive Practice" Should Mean for Competition Students

What adaptive practice should mean for competition students — three dashboard quests and a Daily 5 from past papers on problems.cc, not synthetic drills.

George Ionitsa·22 May 2026

Mathematics4 min read

Daily Maths Puzzles Are on the App Store

We released Problems.cc on the App Store in May 2026 — Cryptarithm, Magic Square, and Summit as a daily maths habit on iPhone and iPad, with no ads and optional sync to problems.cc.

George Ionitsa·15 May 2026

Mathematics7 min read

Decoding the Missing Digit

A Westminster Under seminar: we wrote a card number on the board, ran the Luhn algorithm by hand, and the whole class found the missing digit — modular arithmetic hiding in plain sight.

George Ionitsa·15 May 2026

Mathematics5 min read

PMC Bonus Round 2026: School Results and What They Mean for Parents

A sharper reading of PMC Bonus Round 2026 school results: why total medals are only the start, which schools stand out on golds, and what parents should actually look for.

George Ionitsa·11 March 2026

Mathematics3 min read

IMC Results at Exact Science: 9 Golds, 8 Silvers, 4 Bronzes

A closer look at Exact Science's IMC results: 22 students sat, 21 medals earned, and why progression to Grey Kangaroo, Cayley, and Hamilton matters more than one headline number.

George Ionitsa·2 March 2026

Mathematics5 min read

We Built Daily Maths Puzzles. Here Is What They Are For.

Why we built Cryptarithm, Magic Square, and Summit on problems.cc — daily logic puzzles for competition maths students, between arithmetic drills and full olympiad papers.

George Ionitsa·10 February 2026

Mathematics4 min read

Preparing for the 7+ and 8+ Exams: Beyond Coins and Counting

Why 7+ and 8+ maths should feel current, thoughtful, and purposeful, and why better context often produces better reasoning from bright children.

George Ionitsa·19 August 2025

Mathematics3 min read

Exciting News: Our First Offline Classes Start at Pimlico Academy!

Why opening our first in-person classes at Pimlico Academy mattered, and why a serious maths room can reveal and strengthen thinking in ways online lessons sometimes cannot.

George Ionitsa·24 February 2024

Geometry3 min read

Diving Deep into Geometry: Exact Science's Camp Goes Beyond the Classroom

Why serious geometry still needs more proof, construction, and precision than most students ever get in school, and why that matters for mathematical maturity.

George Ionitsa·19 February 2024

Mathematics4 min read

Power of Maths Olympiad: A Pathway to Academic Excellence

Why Olympiad maths matters beyond medals, and how it builds judgement, resilience, and mathematical control that ambitious students need later.

George Ionitsa·31 December 2023

Mathematics4 min read

How to prepare for the Olympiads?

How to prepare properly for Olympiads: real papers, deliberate problem-solving, stronger feedback, and a clearer understanding of the competition pathway.

George Ionitsa·31 December 2023

Mathematics3 min read

Unveiling Excellence: A Deep Dive into the Primary Maths Challenge Bonus Round Results

A more careful reading of Primary Maths Challenge Bonus Round results, and what parents should actually take from competition tables instead of just chasing rankings.

George Ionitsa·31 December 2023