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You have 100 doors, and you open each of them on your 1st time through, then your second time through you toggle every 2nd door (closing open doors, or opening closed doors), then your third time through you toggle every 3rd door, which doors are opened after 100 times through?
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Quantitative Data Analyst

Interviewed at Cogo Labs

3.2
Nov 17, 2018

You have 100 doors, and you open each of them on your 1st time through, then your second time through you toggle every 2nd door (closing open doors, or opening closed doors), then your third time through you toggle every 3rd door, which doors are opened after 100 times through?

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