The Key to the PST
A full written-case practice test, by Stephan Spijkers
A complete 26-question timed test with a step-by-step answer guide. It trains the skills every online screen rewards: reading dense exhibits, calculator-free math and finding the client’s real question.
Secure checkout by Stripe. Pay by card, Apple Pay or Google Pay. Price includes VAT. Instant download after payment. Every purchase includes the English and the Dutch edition.
PDF e-book, print-ready, instant download. 2026 edition. Best for: Candidates facing McKinsey Solve, BCG’s online case or Bain’s numerical tests who need data-interpretation reps.
Honest note: McKinsey retired the paper PST and now uses Solve. This book trains the underlying data-interpretation and math skills that today’s online screens reward.
What’s inside
- 26 multiple-choice questions across several business cases
- Designed to be taken in 60 minutes without a calculator
- A full answer guide that shows the fastest route to every answer
- Test-day tactics: question-first reading, estimation and smart guessing
- Built on the format of McKinsey’s original Problem Solving Test
“I used your book to prepare and it was really helpful. I just heard that I passed the test, and I finished with about 10 minutes to spare to review the questions I was unsure of.”
Reader, after passing McKinsey’s written test
Questions about The Key to the PST
Is this still useful now that the PST is retired?
Yes, for the skills. The test trains reading dense exhibits, calculator-free math and isolating the client’s question, which McKinsey Solve’s data tasks, BCG’s online case and Bain’s numerical tests all reward. It does not simulate the Solve games themselves.
How should I take the test?
Print it or use a second screen, set a 60-minute timer, put away your calculator and answer every question. Then work through the answer guide question by question, including the ones you got right.
What format is it?
PDF e-book, print-ready, instant download.
Do I also get the Dutch edition?
Yes. Every purchase includes both the English and the Dutch 2026 edition. Your download page lists both PDFs.
How do I get the book after paying?
Right after payment you go straight to your download page. Bookmark it, because it is how you download the book again later. Your receipt arrives by email from Link, Stripe's checkout service. If you lose the page, email info@caseinterviewhq.com with your receipt and you get the link again.
Who processes the payment?
Link, Stripe's checkout service, charges you as merchant of record and handles the payment, VAT, your receipt and any refund. The books are provided by Koopjes Voor Jou BV. Case Interview HQ never sees or stores your card details.
Is there a refund policy?
Yes. If the book does not help you, ask for a refund within 60 days of purchase: email info@caseinterviewhq.com, or contact Link support from your receipt.