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In 2017, I had just finished university and started interviewing for graduate Data Analyst roles.
This was the first time I was asked a logic question:
“How much would it cost to clean all the windows in London?”
At first, I was confused. How is this related to data analysis at an insurance company?
Turns out, it's a Fermi estimation question — common in interviews for product managers, data analysts, and any role that needs you to think logically under pressure.
"I have no idea, I've never even been to London" is the wrong answer.
So is immediately saying, “err £5 million?”
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ANSWER TECHNIQUE
3 tips for answering logic questions:
Estimate via proxy. Use related and known numbers
Upper and lower bounds. What are the extremes? This gives you a range to work with.
Personal references. Use your own experience to make an educated guess.
Read more on answering logic questions in interviews
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