Data Handling and Presentation

Turn messy numbers into charts that tell a story. 📊

📖 Concepts

1What is data?→2Tally marks & frequency tables→3Pictographs→4Bar graphs→5Mean (average)→6Median & mode→7Range & reading charts→8Pie charts — circular story-telling→9Line graphs — showing change over time→10📌 Formula Sheet — Data Handling→

🎯 Practice questions

The tier ladder: 🌱basic warms you up, ⚡regular is exam-paced, 🔥hard twists the same ideas. The 🏆olympiad tier matches the “Achievers” section of the real exam.