PartnerRound
McKinsey Solve
Ecosystem Building guide
Pick a site and eight species that survive the eating rules together.
Format, scoring and strategy
Free, no account needed to read
Guides and free resources
How each firm hires, how every online test works and how to prepare for it, plus the free tools to practise with.
Firm guides
How hiring works at each firm, what its online test involves, a prep plan and what the interviews are like.
McKinsey Solve and interview prep
Everything about McKinsey's online test and interviews in one place: what to expect, how to prepare, and every Solve game to practise free.
Read the McKinsey guide· 4 games
BCG Casey and interview prep
Everything about BCG's online case and interviews in one place: what to expect, how to prepare, and a full Casey case to practise free.
Read the BCG guide· 1 test
Bain SOVA and interview prep
Everything about Bain's online test and interviews in one place: what to expect, how to prepare, and a full SOVA-style test to practise free.
Read the Bain guide· 1 test
Test guides
One guide per online test: the format, how it is scored, strategy, common mistakes and answers to the usual questions.
McKinsey Solve
Sea Wolf guide
Screen microbes across three sites, then average three into a treatment.
Format, scoring and strategy
McKinsey Solve
Red Rock Study guide
A research study and three short cases where half the data is a distraction.
Format, scoring and strategy
McKinsey Solve
Sustainable Futures Lab guide
Lead a river recovery mission through 13 timed team decisions.
Format, scoring and strategy
BCG Online Case
Casey guide
A full case, typed, scored question by question.
Format, scoring and strategy
Bain Online Test
Bain SOVA Assessment guide
Numerical, logical and verbal reasoning, then situational judgement.
Format, scoring and strategy
Free tools
Practise for free while we are in early access. Saving your progress needs a free account.
- Free online test practiceFull-length versions of the McKinsey, BCG and Bain tests, on the real clock, with a scored review.
- The full McKinsey SolveThree Solve games back to back in one sitting, with one report across all of them.
- Case maths drillsTimed percentages, ratios, growth and breakevens, so the arithmetic is automatic on the day.
- Case libraryLive cases with an AI interviewer that pushes back, scored on structure, maths, judgement and communication.
- Application trackerEvery application, deadline and next step in one place, with the right practice linked for each stage.
By email
The free starter kit
A short plan for where to start: one mock interview to find your weakest area, the test for your target firm on the real clock, then five minutes of maths a day.
Ready to practise?
Pick a test or a case and start now. Free, in your browser, with a scored review at the end.