Grade 7 to 9 Core Warmup — Day 13 of 40 | Edexcel GCSE Maths (1MA1) Calculator Walkthrough

Master Grade 7 to 9 calculator fundamentals on Day 13 of the 40-Day GCSE Maths (1MA1) revision series[cite: 374]. Take 80 seconds to attempt each exam question independently, followed immediately by full step-by-step worked solutions showing where method marks are won[cite: 374, 375]. Timestamps: 00:00 Introduction 00:08 Q1 Repeated Reverse Percentages (Question) 01:29 Q1 Repeated Reverse Percentages (Solution) 01:49 Q2 Capture-Recapture Method (Question) 03:10 Q2 Capture-Recapture Method (Solution) 03:30 Q3 Changing the Subject (Question) 04:50 Q3 Changing the Subject (Solution) 05:10 Q4 Quadratic Formula Decimal Solutions (Question) 06:30 Q4 Quadratic Formula Decimal Solutions (Solution) 06:50 Q5 Parallel Line Equations (Question) 08:10 Q5 Parallel Line Equations (Solution) 08:30 Q6 Quadratic Sequences nth Term (Question) 09:50 Q6 Quadratic Sequences nth Term (Solution) 10:10 Q7 Alternate Segment Theorem (Question) 11:30 Q7 Alternate Segment Theorem (Solution) 11:50 Q8 Recurrence Relations (Question) 13:10 Q8 Recurrence Relations (Solution) 13:30 Next Steps & Revision Resources Questions Covered in Day 13: 1. Multi-step reverse percentages with compound percentage changes[cite: 374, 375] 2. Estimating total population using the capture-recapture ratio method[cite: 374, 375] 3. Rearranging formulas involving square roots to make x the subject[cite: 374, 375] 4. Solving quadratics to 2 decimal places using the quadratic formula[cite: 374, 375] 5. Finding the equation of a parallel straight line in the form y = mx + c[cite: 374, 375] 6. Finding the nth term formula of a quadratic sequence[cite: 374, 375] 7. Circle theorems: finding angles using the alternate segment theorem[cite: 374, 375] 8. Evaluating sequence terms from iterative recurrence relations[cite: 374, 375] Download the 40-Day Revision Plan workbooks, question packs, and predicted exam papers: https://mygrade9mathstutor.com[cite: 374] Subscribe for daily walkthroughs and exam coaching:    / @mygrade9mathstutor   #GCSEMaths #EdexcelGCSE #1MA1 #MathsRevision #Grade7Maths #CalculatorPaper #MyGrade9MathsTutor