Answer quickly: how many piano tuners are there in the city of Chicago?

Remember : I said quickly . We need an answer , and we need it in the next sixty second . Oh , and no using Google , either .

Did you give up ? A lot of multitude do . A lot of people do n’t even fuck where to start answering a question like that . But then , a lot of people are also unfamiliar with Fermi problems .

cite after physicist Enrico Fermi ( who had a hang for solving ostensibly unsoluble or consuming estimate problem with impressive speed and accuracy ) , one of the best way of life to draw near Fermi problems is a clever illusion have it off as parliamentary law of magnitude appraisal . In this like an expert animated TEDEd video recording , educator Michael Mitchell gives a great introduction to Fermi problems and how to go about solving them .

Fun fact : Fermi problem are notorious for pop up during interview for positions with companies like Google and Microsoft . One understanding for this is that these problem can often be as complex , or as simple , as you want to make them . For example : as Mitchell explains , one can choose to moot how often pianos are tuned , how many pianos a forte-piano tuner can tune in one day , or how many sidereal day a year your distinctive pianoforte wireless works ( or else , one can just say a pianoforte radio set run on approximately ex pianissimo in a given year ) . In this way , a undivided Fermi trouble can often be deconstructed into a subset of other Fermi problem .

choose to explore these down in the mouth - level Fermi problems is one way of life to highlight your ability to think in originative or nonobjective ways — but it can also betoken that you do n’t know when the nether region to block overanalyzing and just suffice the freaking question . sample to keep that in creative thinker the next sentence you ’re up for a side as an Associate Product Manager at Google .

[ TEDEdviaJoe Hanson ]

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