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PNC Financial Services Group Capital Markets Summer Internship Interview Question (student candidate)

I interviewed in Philadelphia, PA and was asked:
"You have two jugs; a 3 gallon and 5 gallon jug. How can you fill them up or empty them out to reach four gallons?"
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Part of a Capital Markets Summer Internship Interview Review - one of 554 PNC Financial Services Group Interview Reviews

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1. Fill the 3 gallon up and pour it into the 5 gallon
2. Fill the 3 gallon up again and pour the remaining 2 into the 5 gallon, leaving you with 1 gallon in the 3 gallon jug
3. Pour the 5 gallon jug out so its empty
4. Pour the 1 gallon (from the 3 gallon jug) into the 5 gallon jug
5. Fill the 3 gallon jug and pour all of it into the 5 gallon jug, leaving you with 4 gallons in the 5 gallon jug

- Interview Candidate on Jan 26, 2014

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