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2015 AMC 10B Problem 5

Problem 5 of 25Easier

David, Hikmet, Jack, Marta, Rand, and Todd were in a 1212-person race with 66 other people. Rand finished 66 places ahead of Hikmet. Marta finished 11 place behind Jack. David finished 22 places behind Hikmet. Jack finished 22 places behind Todd. Todd finished 11 place behind Rand. Marta finished in 66th place. Who finished in 88th place?

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Solution

Marta finished 66th, so Jack finished 55th. Since Jack finished 22 places behind Todd, Todd finished 33rd. Since Todd finished 11 place behind Rand, Rand finished 22nd. Hikmet finished 66 places behind Rand, so Hikmet finished 88th. Thus, the correct answer is B.

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Concepts: logical deduction

Problem text and solution from the LIVE past-contest archive. See also the AoPS wiki page for community solutions.