need some help answering this brainteaser for an interview.
You are given a scale and a set of 12 marbles. One of the marbles is a different weight; it may be lighter or heavier than the rest. Identify and discard the different marble using the scale a maximum of 3 times, and determine whether it is heavy or light.
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This brainteaser has already been discussed ad nauseam:
http://www.vault.com/nr/newsmain.jsp?nr_page=3&ch_id=421&article_id=185…
You most likely will not get this question in an interview for two reasons: 1.) Everyone's heard it before. 2.) It takes about 10 minutes to run through all the circumstances, and the explanation often gets very messy
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