In this case, you will advise BlueMoon Resorts, a leading alpine resort operator in Scandinavia, as it evaluates Project Summer Mountain—a strategic initiative to transform its mountain resorts into year-round destinations.

This is an augmented version of a case used in McKinsey interviews, designed to test candidates’ ability to navigate complex, layered math problems under pressure. It is considered one of the most math-intensive practice cases available. Candidates will spend the majority of the case working through calculations, and the math is not only high in volume, but also conceptually challenging to solve. While the opening framework is relatively straightforward—with a familiar industry and market entry theme—the math requirements place this case firmly in the advanced category.

The case is particularly valuable for candidates preparing for top-tier consulting interviews, especially those looking to sharpen their math skills and business reasoning. It is well-suited for intermediate to advanced candidates. Beginners should approach with caution.

The case materials include sample solutions, structured frameworks, and detailed interviewer guidance for mock practice sessions.

Enjoy the case, and good luck!

Upcoming MBB Interview and Nervous About Your Math Performance?

You’re not alone. The math portion of consulting interviews at McKinsey, BCG, and Bain is where even strong candidates often stumble — not because they lack intelligence, but because they’re unprepared for the difficulty level, and the speed and precision of the top candidates they’re up against.

In these interviews, you’ll be expected to handle all types of logic-driven quantitative challenges — from the classics to the unconventional questions. All without a calculator. All under tight time pressure.

That’s what the McKinsey Math Marathon is built for — to give you a realistic environment where you can sharpen your math skills and test how truly interview-ready you are.

What You’ll Get

✔️ Challenging, consulting-style math problems based on actual McKinsey interviews
✔️ Timed rounds to simulate real interview pressure
✔️ A competitive environment to benchmark your skills
✔️ Insights into your blind spots

Whether you’re days or weeks away from your interview, this is your chance to practice, prepare, and perform — before it really counts.

Bring pen and paper.

Good luck!