The Pi Garden 🌱

You can drag, poke and rebuild the maths in each of these rooms. Each one starts with a mistake most people make, then shows you how to get it right.

🕰️ Why Time Counts to Sixty Half a metre is 50 cm, so half an hour is 50 minutes… right? 🎭 One Number, Three Costumes ½, 0.5 and 50% are three ways of writing the same number 🏷️ Percentages in the Wild How to work out discounts and deals, and avoid the €25 mistake shops hope you’ll make 🥞 The Recipe Scaler Scale the pancakes up without wrecking the batter 🟩 The Square Counter How area and perimeter work, and why you never need to count 108 squares 📐 Angles Always Add Up An angle is a turn, and every triangle shares the same 180° 🌡️ Below Zero Negative numbers, and how to keep counting past zero 🍬 The Average Machine What the average really means, and when it gives you the wrong idea 📦 Primes Won’t Be Boxed The numbers that can’t be laid out as a rectangle 🎲 How Likely, Really? Putting chance on a line from 0 to 1, and why a coin can’t remember its last flip 🪴 The Greenhouse Practise tables and quick sums a little every day until you just know them