# WDM11/01 June 2024

> WDM11/01 June 2024: 7 questions, 75 marks. Difficulty 0.47, deviation 0.19, algebraic 0.26, text density 0.44. Edexcel IAL Mathematics D1.

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Edexcel IAL · Mathematics · 2024 June

This Decision Mathematics 1 (WDM11) paper contains 7 questions worth 75 marks. The profile below reports five mark-weighted difficulty and complexity measures, and every question row repeats them. Full question text and the mark scheme require Pro access.

- Edexcel IAL
- D1
- 7 questions
- 75 marks
- Pro paper
- [Open in Interactive Practice Hub](https://www.examsci.com/practice?set_id=5f0aa5fd-c7bb-4e39-81fd-cbd20af9b1d9)
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Core finding

**WDM11/01 June 2024 is a past paper for Edexcel IAL Decision Mathematics 1 (WDM11), with 7 questions worth 75 marks.** Its mark-weighted Difficulty Measure is 0.47 on a 0.20–0.75 scale, with a Difficulty Deviation of 0.19 and a mark split of 18.7% Easy, 48.0% Medium and 33.3% Hard. Algebraic complexity averages 0.26; text density and modelling average 0.44. All five measures use 26 part-level tags, not candidate results. Every question row below repeats them and opens the Interactive Practice Hub for that question.

## Difficulty & complexity profile

All five measures are mark-weighted and calculated from 26 parts carrying 75 part marks. Difficulty tags cover 26 parts, algebraic tags 26 and text-density tags 26. Tags are internal metadata, not official exam-board ratings.

- **Difficulty Measure**: 0.47 — 0.20–0.75 · nearer Medium
- **Difficulty Deviation**: 0.19 — 0 = uniform; higher = more mixed
- **Difficulty Ratio**: 18.7 / 48.0 / 33.3 — % Easy / Medium / Hard
- **Algebraic Complexity Measure**: 0.26 — 0.20–0.75 · nearer Low
- **Text Density and Modelling Measure**: 0.44 — 0.20–0.75 · nearer Medium

Scale: Easy 0.20 · Medium 0.45 · Hard 0.75, and Low 0.20 · Medium 0.45 · High 0.75 for the two complexity measures. [How each band is defined and how the values are calculated →](https://www.examsci.com/guides/difficulty-and-complexity-measures/)

### Definitions and calculation

| Measure | Paper value | Formula |
| --- | --- | --- |
| **Difficulty Measure** | 0.47 | Σ(d_i × w_i) / Σw_i, with d = 0.20 / 0.45 / 0.75 |
| **Difficulty Deviation** | 0.19 | √(Σw_i(d_i − μ)^2 / Σw_i) |
| **Difficulty Ratio** | 18.7% Easy / 48.0% Medium / 33.3% Hard | marks in band / all tagged marks |
| **Algebraic Complexity Measure** | 0.26 | Σ(c_i × marks_i) / Σmarks_i, with c = 0.20 / 0.45 / 0.75 |
| **Text Density and Modelling Measure** | 0.44 | Σ(t_i × marks_i) / Σmarks_i, with t = 0.20 / 0.45 / 0.75 |

w_i equals the part marks, except for a Hard part worth 4 or more marks, where w_i = marks^0.75 to offset the accessible starter steps inside long structured questions.

## Question list

Each measure is recalculated from the parts of that question and uses the same weights as the paper profile.

| Question | Topic | Marks | Difficulty Measure | Algebraic Complexity Measure | Text Density and Modelling Measure | Practice |
| --- | --- | --- | --- | --- | --- | --- |
| **Q1** FRQ | [1. Algorithms](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms/) | 14 | 0.33 Medium | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5f0aa5fd-c7bb-4e39-81fd-cbd20af9b1d9&question_id=e9b578bf-aa38-468b-9ffe-5b7e7cd44bb5&source_detail=WDM11%2F01+June+2024) |
| **Q2** FRQ | [4. Critical path analysis](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/critical-path-analysis/) | 10 | 0.49 Medium | 0.20 Low | 0.42 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5f0aa5fd-c7bb-4e39-81fd-cbd20af9b1d9&question_id=99f1a3cc-b897-4480-8238-9964b94d06f0&source_detail=WDM11%2F01+June+2024) |
| **Q3** FRQ | [2. Algorithms on graphs](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/) | 8 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5f0aa5fd-c7bb-4e39-81fd-cbd20af9b1d9&question_id=725636df-9e85-4c14-b127-875a64971890&source_detail=WDM11%2F01+June+2024) |
| **Q4** FRQ | [2. Algorithms on graphs](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/) | 14 | 0.46 Medium | 0.20 Low | 0.43 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5f0aa5fd-c7bb-4e39-81fd-cbd20af9b1d9&question_id=2221cd87-0d9c-405a-8504-19100477d69d&source_detail=WDM11%2F01+June+2024) |
| **Q5** FRQ | [5. Linear programming](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/linear-programming/) | 10 | 0.59 Medium | 0.42 Medium | 0.64 High | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5f0aa5fd-c7bb-4e39-81fd-cbd20af9b1d9&question_id=ffac39aa-7d82-44ef-a443-5b87c7e24f6a&source_detail=WDM11%2F01+June+2024) |
| **Q6** FRQ | [4. Critical path analysis](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/critical-path-analysis/) | 10 | 0.54 Medium | 0.20 Low | 0.58 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5f0aa5fd-c7bb-4e39-81fd-cbd20af9b1d9&question_id=cfe5afc1-4701-441f-88cf-46b6cec0a248&source_detail=WDM11%2F01+June+2024) |
| **Q7** FRQ | [5. Linear programming](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/linear-programming/) | 9 | 0.59 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5f0aa5fd-c7bb-4e39-81fd-cbd20af9b1d9&question_id=cbb2ed46-a907-4b44-a85e-348bfb6d2cb6&source_detail=WDM11%2F01+June+2024) |

## Full questions and mark scheme

This paper is from 2024. Question text, options and the mark scheme are available with Pro access. The metadata above is public so you can still plan revision by topic and difficulty.

[Open this paper](https://www.examsci.com/practice?set_id=5f0aa5fd-c7bb-4e39-81fd-cbd20af9b1d9)

## Topics in this paper

- [1. Algorithms](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms/)
- [4. Critical path analysis](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/critical-path-analysis/)
- [2. Algorithms on graphs](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs/)
- [3. Algorithms on graphs II](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/algorithms-on-graphs-ii/)
- [5. Linear programming](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/linear-programming/)

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## Paper FAQ

**How are the difficulty and complexity measures calculated?**

Each part is weighted by its official marks. Difficulty uses Easy 0.20, Medium 0.45 and Hard 0.75; algebraic complexity and text density and modelling use Low 0.20, Medium 0.45 and High 0.75. A Hard part worth 4 or more marks is down-weighted to marks^0.75, so the accessible starter steps inside a long structured question do not inflate the difficulty result. This paper's Difficulty Measure is 0.47 from 26 parts.

**What does the Difficulty Deviation show?**

It is the mark-weighted standard deviation of the part difficulty values around the paper mean. A value of 0 would mean every tagged part has the same difficulty; this paper's deviation is 0.19, so its parts are more mixed than a single-level paper.

**Is the Difficulty Ratio based on question counts or marks?**

It is based on official marks, not question counts. This paper's shares are 18.7% Easy, 48.0% Medium and 33.3% Hard; the three shares sum to 100% before rounding.

**Are these official difficulty ratings?**

No. They are derived from the platform's part-level difficulty and static-question-profile tags. They are not exam-board grade boundaries and are not calculated from candidate outcomes. Use them to compare the demand profile of papers, not to predict a grade.

**Why does each question row show its own measures?**

Each row recalculates the same mark-weighted formula from that question's parts. A single-part MCQ therefore shows the tag value directly, while a multi-part structured question blends the tags of its parts using the same Hard-part decay as the paper profile.

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Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/past-papers/edexcel-ial/mathematics/decision-mathematics-1-wdm11/2024-june-wdm11-01/