Nervous about Brain Teasers

I've been studying online for upcoming interviews and have seen some people say that they were asked different brain teasers. I know the different financial statements, how $10 depreciation would affect them, walk me through a DCF, pitch me a stock, etc., but I doubt I would be able to figure out how many windows were in an office building, or something of that nature, if I was on the spot in an interview without a pen and paper. Would I get dinged for not being able to answer these sorts of questions?

2 Comments
 

No one can say for sure- depends on who is asking you those questions, what kind of day they were having, how other people answered them.

I will say that brain teasers like you describe are not really that hard with the right mindset.  They are just about having a structured thought process, not about a correct answer.  How many windows in an office building?  Lets say a wall on the building is 200 ft wide.  A 5 ft wide window every 5 feet.  So 20 windows per wall.  4 walls per floor. So 80 per floor.  50 floors for an average skyscraper, so 4000 windows per skyscraper.  Might be way off vs reality.  Maybe there's even a math error,  But easy to follow and hard to complain about.

 

Eum ea ut facere sed consequatur provident. Ut quae maxime repellat aut voluptatem ut consequuntur quia. Soluta non velit est labore. A iure distinctio a ducimus rem mollitia nemo asperiores. Et officia sit animi quia autem.

Career Advancement Opportunities

June 2026 Investment Banking

  • Evercore 01 99.4%
  • Moelis & Company 01 98.8%
  • JPMorgan 01 98.2%
  • Guggenheim Partners 01 97.7%
  • Morgan Stanley 07 97.1%

Overall Employee Satisfaction

June 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Morgan Stanley 01 98.8%
  • Evercore 01 98.2%
  • BMO Capital Markets 12 97.6%
  • Banco Santander 01 97.1%

Professional Growth Opportunities

June 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Evercore No 98.8%
  • Morgan Stanley 05 98.2%
  • JPMorgan No 97.7%
  • BMO Capital Markets 12 97.1%

Total Avg Compensation

June 2026 Investment Banking

  • Vice President (14) $434
  • Associates (43) $259
  • 3rd+ Year Analyst (8) $210
  • 2nd Year Analyst (22) $179
  • Intern/Summer Associate (13) $156
  • 1st Year Analyst (75) $151
  • Intern/Summer Analyst (66) $101
notes
16 IB Interviews Notes

“... there’s no excuse to not take advantage of the resources out there available to you. Best value for your $ are the...”

Leaderboard

success
From 10 rejections to 1 dream investment banking internship

“... I believe it was the single biggest reason why I ended up with an offer...”