2015 AMC 10B Problem 5

Below is the professionally curated solution for Problem 5 of the 2015 AMC 10B, from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2015 AMC 10B solutions, or check the answer key.

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Concepts:logical deduction

Difficulty rating: 960

5.

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?

David

Hikmet

Jack

Rand

Todd

Solution:

Marta finished 6th, so Jack finished 5th. Since Jack finished 2 places behind Todd, Todd finished 3rd. Since Todd finished 1 place behind Rand, Rand finished 2nd.

Hikmet finished 6 places behind Rand, so Hikmet finished 8th.

Thus, the correct answer is B.

Problem 5 in Other Years