Chains Puzzle

You have five pieces of chain, each consisting of three links. You want to make one long chain of these five pieces. Breaking open a link costs 1 $, and welding an open link costs 3 $.

Is it possible to make one long chain of the five pieces, if you have just 15 $?

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SaintlyZero Guru Asked on 22nd September 2018 in Interview Puzzles.
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  • 1 Answer(s)

    Yes,
    take one piece and open all 3 links (3x$1 = $3)
    With those 3 open links you can connect the 4 remaining pieces together. (3x$3 = $9)
    Total cost $12 ($3 + $9)

    CugelTheWise Expert Answered on 24th September 2018.
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