# 9702/12 March 2017

> 9702/12 March 2017: 40 questions, 40 marks. Difficulty 0.32, deviation 0.12, algebraic 0.24, text density 0.34. CIE IAL Physics 9702 P1.

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CIE IAL · Physics · 2017 March

This Physics 9702 Paper 1 (Multiple Choice) paper contains 40 questions worth 40 marks. The profile below reports five mark-weighted difficulty and complexity measures, and every question row repeats them. Full question text and mark scheme open in the Interactive Practice Hub.

- CIE IAL
- 9702 P1
- 40 questions
- 40 marks
- Free paper
- [Practise this paper](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2)
- [All 9702 P1 papers](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/)

Core finding

**9702/12 March 2017 is a past paper for CIE IAL Physics 9702 Paper 1 (Multiple Choice), with 40 questions worth 40 marks.** Its mark-weighted Difficulty Measure is 0.32 on a 0.20–0.75 scale, with a Difficulty Deviation of 0.12 and a mark split of 52.5% Easy, 47.5% Medium and 0.0% Hard. Algebraic complexity averages 0.24; text density and modelling average 0.34. All five measures use 40 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 40 parts carrying 40 part marks. Difficulty tags cover 40 parts, algebraic tags 40 and text-density tags 40. Tags are internal metadata, not official exam-board ratings.

- **Difficulty Measure**: 0.32 — 0.20–0.75 · nearer Easy
- **Difficulty Deviation**: 0.12 — 0 = uniform; higher = more mixed
- **Difficulty Ratio**: 52.5 / 47.5 / 0.0 — % Easy / Medium / Hard
- **Algebraic Complexity Measure**: 0.24 — 0.20–0.75 · nearer Low
- **Text Density and Modelling Measure**: 0.34 — 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** | 0.32 | Σ(d_i × w_i) / Σw_i, with d = 0.20 / 0.45 / 0.75 |
| **Difficulty Deviation** | 0.12 | √(Σw_i(d_i − μ)^2 / Σw_i) |
| **Difficulty Ratio** | 52.5% Easy / 47.5% Medium / 0.0% Hard | marks in band / all tagged marks |
| **Algebraic Complexity Measure** | 0.24 | Σ(c_i × marks_i) / Σmarks_i, with c = 0.20 / 0.45 / 0.75 |
| **Text Density and Modelling Measure** | 0.34 | 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 | [1.2 SI units](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/si-units/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=a6e10d6f-d8bd-4515-b17a-5cbe6e9bef30&source_detail=9702%2F12+March+2017) |
| **Q2** FRQ | [1.1 Physical quantities](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/physical-quantities/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=5e7095b8-8c38-41e8-bcd3-371e95d863c3&source_detail=9702%2F12+March+2017) |
| **Q3** FRQ | [1.4 Scalars and vectors](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/scalars-and-vectors/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=9e2653c4-e458-4e66-bc02-ea813d609035&source_detail=9702%2F12+March+2017) |
| **Q4** FRQ | [2.1 Measurements](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=c12ab97b-9ee7-40d4-a39b-a86d867b5aa8&source_detail=9702%2F12+March+2017) |
| **Q5** FRQ | [2.1 Measurements](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=ca5ff7f9-471a-452c-b565-2b142004749b&source_detail=9702%2F12+March+2017) |
| **Q6** FRQ | [3.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=36848250-c275-47fc-8c54-db23119ccabb&source_detail=9702%2F12+March+2017) |
| **Q7** FRQ | [3.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=702e9fa8-3789-4232-9bed-b0394c4b405c&source_detail=9702%2F12+March+2017) |
| **Q8** FRQ | [4.2 Non-uniform motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/non-uniform-motion/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=bf787063-e2aa-4249-9f55-05aa4fc1e39c&source_detail=9702%2F12+March+2017) |
| **Q9** FRQ | [4.1 Momentum and Newton’s laws of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/momentum-and-newton-s-laws-of-motion/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=16991064-2326-40ab-a614-240c04bc2c9e&source_detail=9702%2F12+March+2017) |
| **Q10** FRQ | [1.4 Scalars and vectors](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/scalars-and-vectors/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=88b38c36-cd32-4093-82e3-f7128cdb9098&source_detail=9702%2F12+March+2017) |
| **Q11** FRQ | [5.1 Types of force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=f904e81c-b8f3-433e-896a-583e243a01a4&source_detail=9702%2F12+March+2017) |
| **Q12** FRQ | [5.2 Turning effects of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/turning-effects-of-forces/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=c5306cc4-126b-4fb4-92b9-5e84aff9938b&source_detail=9702%2F12+March+2017) |
| **Q13** FRQ | [5.1 Types of force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=74ca8f9c-0f27-4bb7-8393-ee06340e145d&source_detail=9702%2F12+March+2017) |
| **Q14** FRQ | [5.3 Equilibrium of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equilibrium-of-forces/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=2a77fdff-971e-4582-81ca-95af246640e9&source_detail=9702%2F12+March+2017) |
| **Q15** FRQ | [5.1 Types of force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=fd82b539-e584-44e5-a46e-db753c306f10&source_detail=9702%2F12+March+2017) |
| **Q16** FRQ | [6.2 Work and efficiency](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=7829e4d6-c29d-4a74-ae51-d270df8523b7&source_detail=9702%2F12+March+2017) |
| **Q17** FRQ | [6.2 Work and efficiency](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=d4a64ca3-dc48-4d11-a943-d9d1c5fb2b1e&source_detail=9702%2F12+March+2017) |
| **Q18** FRQ | [1.4 Scalars and vectors](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/scalars-and-vectors/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=65362840-ded4-44be-9397-a0beed9811f8&source_detail=9702%2F12+March+2017) |
| **Q19** FRQ | [5.1 Types of force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=663c46fb-8664-421e-b9fe-b9febf5da1aa&source_detail=9702%2F12+March+2017) |
| **Q20** FRQ | [9.1 Stress and strain](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/stress-and-strain/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=4b732886-fc06-4a30-84ab-817883587bb7&source_detail=9702%2F12+March+2017) |
| **Q21** FRQ | [9.2 Elastic and plastic behaviour](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/elastic-and-plastic-behaviour/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=f9284242-35e4-4990-a138-152d56fd443d&source_detail=9702%2F12+March+2017) |
| **Q22** FRQ | [14.1 Progressive waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/progressive-waves/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=c4bde98c-e9f6-4a79-8357-dd9d9eee221e&source_detail=9702%2F12+March+2017) |
| **Q23** FRQ | [14.2 Transverse and longitudinal waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/transverse-and-longitudinal-waves/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=35d25213-3d31-49b3-b138-7118d80498b3&source_detail=9702%2F12+March+2017) |
| **Q24** FRQ | [14.1 Progressive waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/progressive-waves/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=7966098f-c972-4aab-bafc-944c4848fbd2&source_detail=9702%2F12+March+2017) |
| **Q25** FRQ | [14.4 Doppler effect](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=f56f7ece-7073-493c-a330-c595358c9f60&source_detail=9702%2F12+March+2017) |
| **Q26** FRQ | [14.5 Electromagnetic spectrum](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electromagnetic-spectrum/) | 1 | 0.45 Medium | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=618e2a5d-48aa-4ac9-a436-4fb61344d24f&source_detail=9702%2F12+March+2017) |
| **Q27** FRQ | [15.1 Stationary waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/stationary-waves/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=8fe774d0-441e-4f8e-a144-788facbda34a&source_detail=9702%2F12+March+2017) |
| **Q28** FRQ | [14.1 Progressive waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/progressive-waves/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=3cfae137-9bc6-4a30-9ec0-5a5e27c228a8&source_detail=9702%2F12+March+2017) |
| **Q29** FRQ | [15.3 Interference, two-source interference](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=15dd9479-a07c-407d-bf2a-d2793894e84c&source_detail=9702%2F12+March+2017) |
| **Q30** FRQ | [17.1 Concept of an electric field](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=302cd0ef-3a87-4de0-bfc1-258ad139af4b&source_detail=9702%2F12+March+2017) |
| **Q31** FRQ | [17.2 Uniform electric fields](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=d1754ad0-22ba-48e4-8f5a-02adb10c3222&source_detail=9702%2F12+March+2017) |
| **Q32** FRQ | [19.1 Electric current](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electric-current/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=20d66c39-91b4-4040-853f-f64728c976e9&source_detail=9702%2F12+March+2017) |
| **Q33** FRQ | [19.1 Electric current](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electric-current/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=a0e8c522-d3ad-4f53-9a67-ddfca1239ad5&source_detail=9702%2F12+March+2017) |
| **Q34** FRQ | [19.3 Resistance and resistivity](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/resistance-and-resistivity/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=f5c2a180-c064-4fbf-8451-dc7f6812276b&source_detail=9702%2F12+March+2017) |
| **Q35** FRQ | [20.1 Practical circuits](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/practical-circuits/) | 1 | 0.45 Medium | 0.45 Medium | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=4e39edf5-0d92-4c14-9c52-d51c02669c2b&source_detail=9702%2F12+March+2017) |
| **Q36** FRQ | [20.2 Kirchhoff’s laws](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/kirchhoff-s-laws/) | 1 | 0.45 Medium | 0.45 Medium | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=c6a12fd7-1103-4dc7-8d66-700b2c2893c5&source_detail=9702%2F12+March+2017) |
| **Q37** FRQ | [20.3 Potential dividers](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/potential-dividers/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=e0779d53-b5da-446c-871f-84777a70d6cb&source_detail=9702%2F12+March+2017) |
| **Q38** FRQ | [26.1 Atoms, nuclei and radiation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=c3e435ad-6a50-494e-b311-73004e26685e&source_detail=9702%2F12+March+2017) |
| **Q39** FRQ | [26.1 Atoms, nuclei and radiation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=0e634f0b-58d2-49ad-a8aa-baf7a725108d&source_detail=9702%2F12+March+2017) |
| **Q40** FRQ | [26.2 Fundamental particles](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/fundamental-particles/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b610c01d-e7d6-457b-b131-048363d0e8a2&question_id=ac4ba1f9-97e9-4ef3-a9f3-03ffc9cce599&source_detail=9702%2F12+March+2017) |

## Topics in this paper

- [1.2 SI units](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/si-units/)
- [1.1 Physical quantities](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/physical-quantities/)
- [1.4 Scalars and vectors](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/scalars-and-vectors/)
- [5.3 Equilibrium of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equilibrium-of-forces/)
- [2.1 Measurements](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/)
- [14.1 Progressive waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/progressive-waves/)
- [2.2 Errors and uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/errors-and-uncertainties/)
- [3.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/)
- [4.2 Non-uniform motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/non-uniform-motion/)
- [4.1 Momentum and Newton’s laws of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/momentum-and-newton-s-laws-of-motion/)
- [4.3 Linear momentum and its conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/linear-momentum-and-its-conservation/)
- [5.1 Types of force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/)

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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 0.32 from 40 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 0.12, 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 52.5% Easy, 47.5% Medium and 0.0% 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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