Estimating “How many lightbulbs are in Manhattan?” is a masterclass in structured thinking. Break it into buckets, use proxies, create a range, and sanity-check.

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Does not state what was studied, just that studying was done. Based on a 6 hr sch day and 190 sch days per year, gives ages 5 - 18 so 14820 hrs at school. Followed 18-21 by 3x30x6 hrs at uni. Leaves on the job training 40 hr per wk x 48 wk per yr for 23 years. age 44 #FermiEstimation #CoreMaths