Percentages and compounding
- A 15% increase means multiplying by 1.15 — not adding 15.
- Consecutive increases compound: 1.1 × 1.1 = 1.21, a 21% rise, not 20%.
- Gaining 10% then losing 10% doesn't return you to the start — you land at 99%.
McKinsey Redrock practice — before test day.
The most realistic McKinsey Redrock simulator for Solve. Practice 15+ full-length case studies across Investigation, Analysis, Report, and Cases — exactly like the live assessment.
- Rating
- 4.9 / 5 (44 reviews)
- Candidates
- 15,000+ candidates
- Fidelity
- Mirrors live Redrock interface
Candidates from leading universities use Solve Games Guide
The McKinsey Redrock case study is about interpretation, not hard math.
McKinsey Redrock (sometimes written Red Rock) is the case-study module in Solve. You investigate a research scenario on Red Rock Island — wildlife redistribution, plant restoration, territory mapping — gather data from exhibits, run calculations, and produce a final report.
Most candidates get the arithmetic right. They lose points by misreading what's being asked — a swapped denominator, a reset assumption, the wrong scope.
What Redrock measures
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Data interpretation
Reading exhibits and research journals correctly before you calculate.
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Calculation accuracy
Using the in-app calculator without arithmetic slips.
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Question interpretation
Answering the question asked — the skill that costs most candidates points.
Four phases, one case study
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Investigation
Explore exhibits and drag findings into your research journal.
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Analysis
Run calculations with the built-in calculator and history log.
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Report
Synthesize findings into a written or visual report.
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Cases
Answer follow-up questions that test whether you understood the case.
The most realistic McKinsey Redrock simulator for Solve.
Generic aptitude drills won't prepare you for Redrock's interface or wording. Our simulator mirrors the live assessment — research journal, calculator with history, and the same four-phase flow — with 15+ full-length scenarios including Stonecreek, Yellowridge, Blackridge, and Wildwood Plains.
- Drag-and-drop research journal
- Calculator with full history tracking
- Feedback when your interpretation drifts
- 15+ authentic case studies
How to prepare for McKinsey Redrock
During the assessment
- Use the calculator and research journal — McKinsey measures tool engagement.
- Answer every question. There's no penalty for a wrong answer.
- Re-read each prompt — assumptions can reset between questions.
- Keep a short review window before submitting.
Watch for assumption resets
Questions in a Redrock case often look sequential, but each one can introduce figures that replace what came before rather than adding to it. Read every prompt as if it stands alone.
Question 1: "50 elk and 30 bears live in Zone A."
Question 2: "Assume 40 elk live in Zone A. How many bears can it support?"
Wrong: treating 40 elk as additional to the 50 from question 1.
Correct: question 2 resets the elk count to 40, overriding question 1.
McKinsey Redrock FAQ
What is the McKinsey Redrock case study?
Redrock (sometimes called Red Rock) is the case-study module of the McKinsey Solve assessment, set on Red Rock Island. You investigate a research scenario — wildlife redistribution, plant restoration, territory mapping — gather data from exhibits, run calculations, and produce a final report. It tests data interpretation, calculation accuracy, and most importantly question interpretation.
How long is the Redrock module?
Redrock takes around 35 minutes within the standard 65-minute Solve assessment (Redrock + Sea Wolf), or roughly the same within the 85-minute version that adds SFL. Each case has an estimated time displayed before you begin.
Why is question interpretation the hardest part?
Most candidates can do the math. They lose points by answering a slightly different question than the one being asked. Our simulator's feedback tells you exactly when your interpretation drifted.
How realistic is the simulator?
Our simulator mirrors the live Redrock interface and wording: research journal drag-and-drop, calculator with history tracking, and the same four-phase Investigation → Analysis → Report → Cases flow. We've built 15+ full-length authentic scenarios — Stonecreek, Yellowridge, Blackridge, Eagleridge, Wildwood Plains, Marshland Plant Restoration, and more.
How do I practice McKinsey Redrock?
Start with a free trial of the Redrock Simulator. You'll work through full case studies with the same Investigation → Analysis → Report → Cases flow as the live assessment — including the built-in calculator and research journal.
What is Red Rock Island?
Red Rock Island is the fictional setting for McKinsey Redrock case studies. Each scenario places you in an ecological research context where you gather exhibit data, run calculations, and produce a report. The island name is part of the case framing — the assessment tests interpretation and quantitative reasoning, not geography trivia.
Is there a free trial?
Yes. Start practicing McKinsey Redrock immediately — no credit card required. You'll get access to the full simulator interface and can work through case studies at your own pace.
Walk into McKinsey Redrock already familiar with it.
Free to start. No card required. 15+ full-length McKinsey Redrock case studies — the same realistic practice McKinsey will measure you on.