Edexcel IAL Maths Decision 1 – Solution Bank
Ch. 2: Graphs and Networks
Ch. 3: Algorithms on Graphs
Ch. 4: Route Inspection
Ch. 5: The Travelling Salesman Problem
Ch. 6: Critical Path Analysis
Ch. 7: Linear Programming
Review Exercises
🧮 Edexcel IAL Decision 1 – Solution Bank (D1)
Decision 1 (D1) is the problem-solving and algorithmic thinking module in the Edexcel International A-Level (IAL) Mathematics course. From shortest paths to critical path analysis and linear programming, it’s all about applying logic and structure to real-world problems.
At holenow.com, our D1 Solution Bank gives you complete step-by-step answers to every question in the official Edexcel D1 textbook — aligned with the WDM11 syllabus.
📘 What’s Covered in Edexcel IAL D1?
Our D1 Solution Bank is organized into 7 chapters, each with fully worked exercises and review questions. You’ll also get access to two full mixed-topic review exercises to test your understanding before the exam.
🧠 Chapter Summaries
📌 Chapter 1: Algorithms
- Understand algorithms, tracing steps, and complexity
- Exercises: D1 1A to 1F
- Topics: Pseudo-code, flowcharts, dry runs
- Chapter Review 1
🔗 Chapter 2: Graphs and Networks
- Learn how to represent real-life systems using graphs
- Exercises: D1 2A to 2D
- Topics: Nodes, edges, adjacency matrix, Eulerian graphs
- Chapter Review 2
🧮 Chapter 3: Algorithms on Graphs
- Apply algorithms to graphs to solve problems efficiently
- Exercises: D1 3A to 3E
- Topics: Dijkstra’s algorithm, Prim’s algorithm, Kruskal’s method
- Chapter Review 3
🚗 Chapter 4: Route Inspection
- Solve problems involving traversing networks
- Exercises: D1 4A & 4B
- Topics: Eulerian trails, minimum route inspection
- Chapter Review 4
🌍 Chapter 5: Travelling Salesman Problem (TSP)
- Find optimal routes between nodes
- Exercises: D1 5A to 5D
- Topics: Nearest neighbor, upper bound/lower bound algorithms
- Chapter Review 5
⏱️ Chapter 6: Critical Path Analysis (CPA)
- Analyze project scheduling with dependency diagrams
- Exercises: D1 6A to 6G
- Topics: Float times, earliest/latest event times, Gantt charts
- Chapter Review 6
📊 Chapter 7: Linear Programming
- Solve real-world optimization problems using inequalities
- Exercises: D1 7A to 7D
- Topics: Graphical LP, feasible regions, objective functions
- Chapter Review 7
📚 Final Revision Content
- D1 Review Exercise 1 – Mixed-topic exam-style practice
- D1 Review Exercise 2 – Higher-level reasoning and logic
- Practice Paper: Included with step-by-step solution strategy
✅ Why Use holenow.com’s D1 Solution Bank?
- 📘 Based on the official Edexcel IAL Decision 1 textbook
- ✍️ Solutions are fully explained — ideal for revision & learning
- 📱 Fast, mobile-optimized design for students on the go
- 🧾 Solutions include diagrams, graphs, and algorithm flow examples
- 🆓 Completely free — no sign-ups, no paywalls
- 💡 Perfect for students, tutors, and revision centers
🎯 Best For:
- 🎓 Students preparing for the WDM11 Decision Maths paper
- 🧑🏫 Tutors teaching Edexcel IAL Decision 1
- 📚 Self-learners needing logic-based question support
- 💼 Future engineers, economists, and data analysts
💡 Pro Tip:
In Dijkstra’s algorithm questions:
- Always label permanent and temporary values clearly
- Work from the start node outward, updating the shortest path
- Double-check for more efficient paths after each update step
Mistakes in early steps often lead to incorrect final answers — stay methodical!
❓ FAQs – IAL D1
🔗 Related Resources on holenow.com
- 🔢 [Edexcel IAL Pure Maths 1–4 – Solution Banks]
- ⚙️ [Edexcel IAL Mechanics 1–3 – Solution Banks]
- 📊 [Edexcel IAL Statistics 1–3 – Solution Banks]
- 🧾 [IAL Formula Booklets + Past Paper Links]
🏁 Final Thoughts
Edexcel IAL Decision 1 trains you to think logically and solve real-world problems using structured techniques. With holenow.com’s D1 Solution Bank, you get accurate, exam-focused solutions in a way that’s fast, free, and easy to use.
🚀 Master algorithms.
📘 Conquer Dijkstra.
🎯 Score high in WDM11 Decision Maths — only at holenow.com.