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L.E.K. Consulting interview questions

26 questions researched across 1 L.E.K. Consulting seat in Consulting. Below are 12 of them.

Seats we researched

  • AssociateConsulting · graduate · 30 min

12 L.E.K. Consulting interview questions

  1. Let's try a short logic problem. Planes take off from JFK and LAX every hour on the hour, flying the same New York to Los Angeles route, and the flight takes five hours. You leave New York at noon Eastern. How many planes flying the opposite way do you pass on the way?

  2. In that problem, what information really mattered and what was superfluous — and what logical traps did you have to avoid?

  3. New case. Two competing beer companies have similar revenues and steady growth. Cheapo Beer, the 'All-American Beer,' shows consistent moderate profit growth. Bourgeois Beer, marketed as brewed with fresh mountain water, sees big swings in profit. Why might that be? Structure it for me.

  4. You're now the CEO of Bourgeois. What steps would you take to reduce the profit fluctuations?

  5. Final case. A pharmaceutical client has developed IPP2, a daily pill that restores hair thickness to what it was at age fifteen within three months. How would you estimate the market size?

  6. Now, how would you think about pricing IPP2?

  7. Here is a chart with three trends. Tell me what matters and what you would ignore.

  8. In a written case you have forty minutes and no interviewer. How do you budget that time?

  9. Tell me about a time your recommendation was rejected.

  10. What data would you want to test that, and what assumptions are you making about the two businesses?

  11. Pick an experience on your CV where you had to marshal data to reach a conclusion and then defend it. Walk me through it.

  12. What draws you to consulting rather than industry, banking or investing — and what would make you leave it?

What a strong answer does

The questions above fall into 2 kinds. What a strong answer does differs by kind, not by question.

Case9 of 12 above
Clarify the objective; build a mutually exclusive structure; prioritize the highest-value branch; analyze with evidence; synthesize a recommendation, risks, and next step.
Behavioral3 of 12 above
Lead with the claim and context; isolate your personal action and decision; explain the trade-off; quantify the result; finish with what you learned and changed.

14 more L.E.K. Consulting questions

The rest of the bank — 26 in total — is asked by the interviewer during practice, so you meet them the way you would on the day rather than reading them first.

Practise L.E.K. Consulting questions

How these questions were researched

Every question carries a provenance grade. Some were reported by candidates who sat the round, some come from the firm’s own published guidance or a source that trains for it, and the rest are written to match how this firm asks. Each seat is studied on its own — the round it actually runs, the order it runs it in, and what it is listening for. A L.E.K. Consulting round is not a generic behavioural screen, and practising one as the other is how people walk in unprepared.

Falas is not affiliated with or endorsed by any employer named. Simulations are independent practice based on publicly described recruiting formats.