February 21, 2011

An interesting maths question

You have 2 supposedly unbreakable light bulbs and a 100-floor building. Using fewest possible drops, determine how much of an impact this type of light bulb can withstand. (i.e. it can withstand a drop from 17th floor, but breaks from the 18th).

From http://maxnoy.com/interviews.html(and no, I will never be going to a Programming interview, it was just random interneting). 



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  1. My computer genius friend was asked this exact question in an interview! My instinct is to do a binary thingy which means 50 drops. But if I remember correctly you can do it in about 20.

    21 Feb 2011, 18:44


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