McKinsey Redrock (Red Rock) Game: Format, Traps and a Method

McKinsey Red Rock is the data-analysis game in McKinsey Solve. Reportedly it is one connected Study (Investigation, Analysis, Report) followed by six short standalone Cases, all on a shared clock of about 35 minutes with an on-screen calculator. McKinsey's August 2025 Solve FAQ confirms only that each task opens with an untimed tutorial, that your invitation states the total length and that outside tools are banned; it publishes no Red Rock format or scoring. Red Rock appears in every 65-, 85- and 95-minute Solve invitation described in 2026 (sources checked October 3, 2026).

A teaching exercise, not assessment content. The fictional restoration study below was written for this guide. It is a short teaching exercise, not a full official-format simulation. No question, answer or score comes from McKinsey.

Checked October 3, 2026. McKinsey has not published a Red Rock blueprint. Every format detail below is labelled as official or reported.

What is McKinsey Red Rock in 2026?

Red Rock is the data-analysis game in McKinsey Solve: you read a scenario set in a natural environment, collect the evidence that matters, calculate from it and communicate a conclusion with a chart. No business or biology knowledge is needed.

Red Rock appears in every invitation length candidates have reported in 2026. A 65-minute invitation is reported as Red Rock plus Sea Wolf; an 85-minute one adds the standard Sustainable Futures Lab; and a newer 95-minute version adds a longer SFL, with 95-minute invitations first reported on August 24, 2026 and the new 30-minute SFL first described on September 11 (see the 95-minute guide). Whichever you receive, Red Rock is the most calculation-heavy part of the McKinsey Solve assessment.

Searches also spell it "Redrock", "Red Rock Island" or "Red Rock study". They mean the same game (the names, side by side). It is reported to date from 2023, when it replaced the older Plant Defense game. The same reports say Red Rock became the first game after the Ecosystem game was removed around mid-2025; a separate report dates that to early 2026, and McKinsey has announced neither date (the PSG and Imbellus history covers who says what, and the older names).

Redrock, Red Rock, Redrock Island or Redrock Study: is it the same game?

Yes. Redrock, Red Rock, Redrock Island and Redrock Study all point to the same McKinsey Solve data-analysis game. "Redrock" as one word is the spelling most searches use; "Red Rock" is the spelling this guide uses in body text. "Redrock Study" names the first part of the game, before the six Cases, not a separate test. No McKinsey Red Rock specification is public, so the table records how each name is used, not a naming rule from McKinsey.

What is the reported Red Rock format?

Red Rock is reported as a three-stage Study (Investigation, Analysis, Report) followed by six standalone Cases, on one shared clock of about 35 minutes. Preparation providers and candidate posts describe this same broad shape. It is a reported version, not a universal McKinsey specification: your invitation and the live tutorial control the format and timing you receive.

• Investigation: select evidence relevant to the objective and keep labels, units and periods with it.
• Analysis: answer quantitative questions using that evidence. Practise percentage change, percentage points and weighted or pooled rates below.
• Report: complete the conclusion and choose or populate the requested chart. The worked report question shows how chart choice follows the objective.
• Cases: solve shorter standalone questions with their own inputs; do not carry Study assumptions into a new case.

What does each Redrock phase look like, screen by screen?

Each Redrock phase asks for a different action: save evidence in Investigation, calculate in Analysis, fill blanks and a chart in the Report, then answer six short standalone Cases. The screens below are independent practice, not McKinsey screens: they come from the Road to Offer Red Rock simulation and show the reported shape of each phase, not the live interface. Your tutorial shows the real layout.

Report. Candidates describe a short written conclusion with numeric blanks, then a chart to choose and populate. We do not show a Report screen; Question 4 below rehearses the chart choice on an original dataset.

What types of questions does Red Rock ask?

Red Rock asks mostly calculation questions, with some reading and some chart work. One prep site estimates that math questions are about 60 to 70% of Red Rock, reading questions about 20%, and visualization questions the rest, across "more than a dozen" questions in total. That split is not McKinsey data, and no second source we read publishes shares.

The Report is reported as a short written summary with numeric blanks, a chart type to choose and values to populate (another description adds a table to fill). Each of the six Cases is described as a short, independent question, usually multiple choice or fill-in-the-blank. Exact counts vary by sitting, which is why the time budget below is set by part, not per question.

How do the Red Rock calculator and Research Journal work?

Red Rock gives you an on-screen calculator and a Research Journal where you save evidence, and sources say the two connect. Every source we read describes both; they differ on details, and McKinsey describes neither publicly. What they report:

• The calculator logs its results. It is described as logging every answer as collectible data without rounding, and another description says you can drag a prior result into the next calculation. Practise keeping full precision until the final answer.
• It is basic. It has no power function. Growth over several periods therefore means repeated multiplication, not an exponent key.
• It connects to the journal. Another source says you can drag journal data straight into the calculator, so a well-labelled journal saves retyping.
• Outside tools are not allowed. This part is official: McKinsey's August 2025 FAQ bars applications, websites, AI tools and pre-prepared notes, so a phone calculator or spreadsheet is out. McKinsey's assessment integrity expectations also name a calculator among outside aids and allow pen and paper for notes and calculations. The only exception is an accommodation McKinsey has approved in writing.

Mental math, paper or the in-game calculator?

Use the simplest permitted route that keeps the answer accurate: mental math for a step you recognise on sight, pen and paper for a short chain of whole numbers, and the in-game calculator for division, decimals or an awkward percentage. No rule says every calculation must use the calculator. The rehearsal targets are our coaching suggestions, not McKinsey limits.

Blank paper and the reported research journal do different jobs: paper holds a formula or a scratch check, while the journal keeps the source fact with its exhibit and unit for later questions. Arrive with blank paper, not a formula sheet, because prepared notes are banned; McKinsey's integrity page also says you may be asked to show your notes. If the percentage example above takes you longer than the target, find out whether the delay was choosing the denominator, copying a number or operating the tool, and drill that step.

Research Journal and Report confirmation

Third-party reconstructions describe selecting or dragging relevant facts into a Research Journal, then using saved evidence and an on-screen calculator during Analysis. Save the label, unit, period and denominator with each number. Our evidence-selection question demonstrates that habit without claiming to reproduce the official interface.

Some reconstructions describe Report confirmation as closing the Study before Cases begin. Descriptions of navigation differ, so check your tutorial before relying on a return button. Review numeric blanks, units and chart labels before confirming; do not assume an earlier phase can be reopened.

How is Red Rock scored?

McKinsey does not publish how Red Rock is scored. Its public Solve page and August 2025 FAQ give no scoring weights, no pass mark, no pass rate and no score scale shown to candidates. They say only that results are considered alongside the rest of your application. Anything more specific is a third-party theory.

The most common theory splits scoring into a "product" score (whether your answers are right) and a "process" score (how you got there, for example which evidence you saved or how you moved through the screens). Sources present this with different levels of confidence and none cites McKinsey. Percentages that circulate for how many candidates fail Solve are unsourced estimates; our pass-rate guide explains why none of them can be verified.

The practical conclusion does not depend on which theory is true. Correct answers obviously matter. Deliberate, relevant evidence selection is also how you get correct answers, so it is worth doing well whether or not it is measured. Random clicking to "look active" or saving every number on screen helps under neither theory. For what a result can and cannot tell you after you submit, read Solve scores and results.

How should you budget 35 minutes in Red Rock?

Split Red Rock's reported 35 minutes as about 7 minutes for Investigation, 10 for Analysis, 6 for the Report and 12 for the six Cases, roughly 2 minutes per Case. This is our suggested budget, not a split from McKinsey: McKinsey does not divide the clock for you. Running out of time with Cases unanswered is a failure candidates describe, and a rehearsed budget prevents it.

Sources disagree on the clock itself: most report 35 minutes, while one says 30. One suggests about 5 minutes for Investigation, up to 15 for Analysis, 5 for Report and 12 for the Cases. Our split gives Investigation slightly more time because evidence selection drives every later answer; either works if you rehearse it.

Why protect the Cases? Each Case is short and self-contained, so two minutes usually buys a complete answer. An extra two minutes polishing a Study chart rarely buys as much. In a practice run, note the clock at each checkpoint and adjust next time. If you finish the Study early, the surplus goes to the Cases, not to re-reading exhibits. For a fuller pacing plan, see Red Rock time management.

Run the free Red Rock simulation against the clock

Road to Offer's complete free Red Rock run includes the full Study and six Cases: 13 scored responses, 36 points and a 35-minute practice clock. The clock is advisory: answers still count after zero. Start without an account; create a free account to finish and keep your score, points breakdown and worked feedback on submitted decisions with highlighted calculations and charts, with no payment for the first run or review. Sea Wolf, SFL Classic and SFL Island each also have a complete free run. Paid Learning mode adds step-by-step coaching and feedback across all four formats, untimed in the clocked games, with the matching game pack, Solve pack or qualifying Annual access. The separate Solve plan is free with a free account: it asks your invitation length and test date, then gives dated practice steps selected for that invitation for up to 28 days.

What are the most common Red Rock traps?

The five Red Rock traps that cost the most points are saving numbers without units, using the wrong denominator, averaging percentages that should be pooled, using attractive but irrelevant facts, and spending the Cases' time on the Study. These come from the error patterns that candidate posts and preparation material describe, and from the mistakes our own worked questions are built to expose. None is a claim about McKinsey's marking.

Two smaller traps are worth a line each. Percentage points and percentages are not interchangeable (a rise from 40% to 50% is 10 points but 25%). And a Case's inputs belong to that Case: do not import an assumption from the Study. The Redrock math mistakes section lists seven more, each with a worked fix.

What is Red Rock practice preparing you to do?

Red Rock practice prepares you to select the right evidence and calculate from it under time pressure. The reported research journal matters because later work may depend on evidence selected earlier. A useful preparation habit is therefore to save a number with its label, unit, period and denominator, rather than copying an isolated value. Calculator fluency cannot rescue the wrong inputs or formula. Your invitation and the live tutorial remain authoritative for the tools, order and time available to you.

The durable Red Rock skills

• Evidence selection: match each saved fact to the question it can answer and ignore attractive background data.
• Percentage reasoning: distinguish relative growth, percentage-point change and a share of a total.
• Pooled and weighted quantities: combine counts or apply the correct weights instead of averaging rates blindly.
• Chart judgment: choose a visual that preserves the relationship in the data, then state what it shows without inventing causation.

Preparation sites publish different clocks and question counts, and McKinsey's current public FAQ says only that the total length is stated in each candidate's invitation. The connected exercise below focuses on the reasoning that survives a changed interface. For a full week of preparation around it, use the Solve prep plan.

How does this Red Rock practice workbook diagnose mistakes?

Each question isolates one reasoning error: selecting irrelevant evidence, using the wrong denominator, averaging rates that should be pooled, or choosing a chart that changes the meaning of the data. Work the question before opening its explanation, then name the error rather than only recording the correct answer.

The brief: did a wetland restoration program improve?

A research team manages two non-overlapping wetland zones, North and South. It wants to report how much restored area increased between Year 1 and Year 2 and what proportion of Year 2 water samples passed its local quality test. The sampling program is separate from the area measurement: a hectare is not a water sample.

The total site contains 500 hectares. A weather station recorded 12 rainy days in Year 2. Those are background facts, not automatically inputs to every calculation. The two tables below contain all the data needed for the four questions.

Area is measured in hectares; sample counts are individual tests.

Question 1: which evidence answers the growth question?

The team asks: “By what percentage did the combined restored area grow from Year 1 to Year 2?” Choose the required evidence before doing arithmetic:

1. The two restored-area columns for both zones.
2. The Year 2 sample-pass counts.
3. The total site area of 500 hectares.
4. The number of rainy days.

Question 2: pooled growth, not the average of growth rates

Calculate combined growth and each zone's growth. Use (new value minus old value) divided by old value, then multiply by 100. Should you average the two zone percentages to obtain the combined answer?

Separate relative growth from percentage-point change

Now suppose a separate monitoring indicator rose from 40% to 50%. Did it rise by 10%, by 10 percentage points, or by 25%?

Question 3: calculate the overall sample-pass rate

What percentage of all Year 2 samples passed? North passed 18 of 20 and South passed 48 of 80. Try it before opening the answer. Should each zone's percentage receive equal weight?

Which denominator does each Red Rock question need?

In Red Rock, the wording of the question decides the denominator: growth divides by the starting value, a pass rate divides by all tests, and a change between two rates is measured in percentage points. The same table supports several valid calculations; the Red Rock math guide drills this arithmetic.

Keep the readable math in your notes: 50% minus 40% is 10 percentage points, while 66 passes divided by 100 tests is 66%. The picture is a reminder of the distinction, not a substitute for writing the numerator, denominator and unit.

Question 4: choose a chart that matches the report

The report asks readers to compare each zone's restored area in Year 1 and Year 2. Which is the clearest choice: a grouped bar chart, a pie chart of all four measurements, or a line chart labeled “daily restoration”?

Which chart types can the Report ask for?

Reported chart types include bar, line, pie, stacked area, stacked bar, scatter, bubble, tree map, radar and histogram as chart types that can appear. You choose one that fits the data, not one you like. The matching rule is the same one Question 4 uses:

What is a repeatable Red Rock practice routine?

Use the same five steps on every Red Rock question: restate it, select the evidence, write the formula, check magnitude and units, then explain the result.

1. Restate the question. Name the quantity, period, comparison and requested unit.
2. Select only relevant evidence. Keep labels and denominators beside values.
3. Write the formula before substituting. A correct arithmetic operation on the wrong denominator remains a wrong answer.
4. Check magnitude and units. A 32 ha increase on 200 ha should be more than 10% and less than 20%.
5. Explain the result. Separate observation from an unsupported causal conclusion.

These are preparation habits, not claims about hidden process scoring or how often you must click a journal. For the broader assessment journey, use the invitation guide. For a different original exercise, try Sea Wolf combinations.

Is there a McKinsey Redrock answer key or answers PDF?

No. There is no reliable McKinsey Redrock answer key or answers PDF, even though "Red Rock answers" is a common search and several sites sell or share what they present as answer sets. Three reasons:

• No official questions or answers are published. Every "real" question you find online is a candidate's reconstruction from memory or a third party's imitation.
• The content varies. Candidates describe different scenarios, exhibits and numbers in different sittings. A memorised answer such as "16%" is only correct for one dataset, and a slightly different table makes it wrong.
• Using one is against the rules. McKinsey's FAQ asks candidates to work alone, without outside tools, and not to record the assessment. Consulting a key during the test breaks that, whatever any seller claims about detection.

What transfers instead is the method behind every answer on this page: restate the quantity, select the matching evidence, write the formula, check the magnitude and label the unit. The four worked questions above are original for exactly this reason: their value is in the explanation of each wrong answer, not the final number. When you want a fresh dataset with feedback, the practice page lists the free Red Rock simulation, and the McKinsey Redrock practice questions add six more original items, each with worked answers and the tempting wrong answer. The Solve tips guide covers habits that apply across all three games.

How does Red Rock fit into McKinsey Solve preparation?

Red Rock shares every reported McKinsey Solve session with Sea Wolf, so a calm, budgeted Red Rock leaves energy for Sea Wolf, which tests a different skill: checking combinations against constraints (see Red Rock vs Sea Wolf for how they compare). Before test day, confirm your setup with the test-day checklist and read your invitation for the total length and deadline. If you are wondering how demanding it is relative to the other games, is McKinsey Solve hard? sets realistic expectations, and the Solve timeline shows where the assessment sits in recruiting. Format changes are logged on what's new in Solve.

Sources and evidence boundaries

McKinsey's official assessment page and its August 2025 FAQ were checked October 3, 2026. They are the only official sources here: they establish that the assessment length is in your invitation, each task opens with an untimed tutorial, no business or gaming knowledge is needed, you work alone without outside tools, and results are considered with the rest of your application. McKinsey says no preparation is required. Our optional exercises teach transferable reasoning and do not predict hiring outcomes.

Format details (one Study in three stages, six Cases, about 35 minutes, the research journal and calculator) are reports from candidates and third-party sites, consistent across sources checked between September 20 and October 3, 2026. Their format descriptions and scoring theories are third-party material, not an official specification. The time budget and traps are our own guidance. Question-type shares, the calculator's logging behaviour, the chart list, Analysis counts, the 2023 introduction and the mid-2025 Ecosystem removal are single-source reports, re-read October 3, 2026, and remain unverified. This article is a practice method built on a new wetland dataset. For a format-first reference with more worked numbers, our sister site's Road to Offer Red Rock study guide covers the game phase by phase; nothing here is copied from it.