# WDM11 Algorithms on graphs Topic Questions > Edexcel IAL WDM11: every Algorithms on graphs topic question from 16 papers (2019–2026), grouped by syllabus point. 68 questions, 199 marks, with direct… - Canonical HTML: https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/ - Markdown mirror: https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/index.md --- Edexcel IAL · Mathematics · WDM11 · A Level Every WDM11 Algorithms on graphs topic question from the 2018–current syllabus, drawn from 16 papers (2019–2026) and grouped by syllabus point. Each row opens a page listing the exact question numbers, marks and a direct link into the paper. These are questions by topic, not full papers, so you can revise one topic at a time. - WDM11 - 3 subtopics - 68 topic questions - 16 papers - 199 tagged marks - [Back to Algorithms on graphs](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/) - [All paper codes](https://www.examsci.com/topics/) Core finding **2.1 The minimum spanning tree (minimum connector) problem. Prim's… is the most frequently assessed subtopic in Algorithms on graphs, with 26 topic questions and 58 marks across 15 papers.** 2.3 Dijkstra's algorithm for finding the shortest path. follows with 26 topic questions and 109 marks. The topic contains 3 subtopics, 68 topic questions and 199 marks in total. Rows count only the parts tagged to that subtopic, keep the same colour in both charts and repeat paper count, tagged marks and year range in the native table. ## Topic question count and mark distribution Subtopics are on the vertical axis and sorted from highest to lowest. Only the parts whose knowledge graph matches a subtopic are counted for it, and percentages are each row's share of the tagged total in that chart. A part tagged to several subtopics is counted in each bar, so the bars are not a partition of the topic total. ### Questions by subtopic question items - [2.1 The minimum spanning tree (minimum connector) problem. Prim's algorithm.](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-1-the-minimum-spanning-tree-minimum-connector-problem-prim-s-algorithm/) (15 papers) — 26 · 36.1% - [2.3 Dijkstra's algorithm for finding the shortest path.](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-3-dijkstra-s-algorithm-for-finding-the-shortest-path/) (16 papers) — 26 · 36.1% - [2.2 The minimum spanning tree (minimum connector) problem. Kruskal's algorithm.](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-2-the-minimum-spanning-tree-minimum-connector-problem-kruskal-s-algorithm/) (8 papers) — 20 · 27.8% ### Marks by subtopic marks - [2.3 Dijkstra's algorithm for finding the shortest path.](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-3-dijkstra-s-algorithm-for-finding-the-shortest-path/) (16 papers) — 109 · 53.2% - [2.1 The minimum spanning tree (minimum connector) problem. Prim's algorithm.](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-1-the-minimum-spanning-tree-minimum-connector-problem-prim-s-algorithm/) (15 papers) — 58 · 28.3% - [2.2 The minimum spanning tree (minimum connector) problem. Kruskal's algorithm.](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-2-the-minimum-spanning-tree-minimum-connector-problem-kruskal-s-algorithm/) (8 papers) — 38 · 18.5% ## Subtopic comparison matrix Curriculum order is by syllabus number, then alphabetically. Every row links to the matching past-paper question list. | Subtopic | Topic questions | Papers | Marks | Years | | | --- | --- | --- | --- | --- | --- | | **[2.1 The minimum spanning tree (minimum connector) problem. Prim's algorithm.](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-1-the-minimum-spanning-tree-minimum-connector-problem-prim-s-algorithm/)** | 26 | 15 | 58 | 2019–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-1-the-minimum-spanning-tree-minimum-connector-problem-prim-s-algorithm/) | | **[2.2 The minimum spanning tree (minimum connector) problem. Kruskal's algorithm.](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-2-the-minimum-spanning-tree-minimum-connector-problem-kruskal-s-algorithm/)** | 20 | 8 | 38 | 2019–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-2-the-minimum-spanning-tree-minimum-connector-problem-kruskal-s-algorithm/) | | **[2.3 Dijkstra's algorithm for finding the shortest path.](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-3-dijkstra-s-algorithm-for-finding-the-shortest-path/)** | 26 | 16 | 109 | 2019–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-3-dijkstra-s-algorithm-for-finding-the-shortest-path/) | ## Browse every topic question - [2.1 The minimum spanning tree (minimum connector) problem. Prim's algorithm.](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-1-the-minimum-spanning-tree-minimum-connector-problem-prim-s-algorithm/) — 26 question items · 15 papers — 58 marks · 2019–2026 - [2.2 The minimum spanning tree (minimum connector) problem. Kruskal's algorithm.](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-2-the-minimum-spanning-tree-minimum-connector-problem-kruskal-s-algorithm/) — 20 question items · 8 papers — 38 marks · 2019–2026 - [2.3 Dijkstra's algorithm for finding the shortest path.](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/2-3-dijkstra-s-algorithm-for-finding-the-shortest-path/) — 26 question items · 16 papers — 109 marks · 2019–2026 ## Other topics in WDM11 - [Algorithms 75 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms/) - [Algorithms on graphs II 99 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs-ii/) - [Critical path analysis 98 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/critical-path-analysis/) - [Linear programming 91 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/linear-programming/) ## Topic question rules and edge cases **How many subtopics does Algorithms on graphs contain?** This page lists 3 subtopics tagged to the current syllabus. They are ordered by syllabus number, then alphabetically, and each row opens a page of matching past-paper questions. **How are the subtopic question and mark totals calculated?** A multiple-choice question contributes one item and its marks to every subtopic it is tagged with. A structured question contributes one item per tagged part, and that part’s marks; untagged parts of the same question are not counted here. A part tagged to several subtopics therefore appears under each of them. **Why do some subtopics have no numbered prefix?** Practical-skills statements and some syllabus bullets are unnumbered. Numbered statements come first; unnumbered statements and ties are sorted alphabetically. **Is the LaTeX rendered without JavaScript?** Yes. Subtopics that contain formulas are converted to static KaTeX HTML during the build, and the KaTeX stylesheet is served from the same site. --- Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/