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2014 AMC 10A Problem 8

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2014 AMC 10A Problem 8AMC 10 Step by Step
Name:                             Date: September 13, 2026
Number Properties · difficulty 2 of 5 · about 2 min · position P1-10

Which of the following numbers is a perfect square?

  1. A)

    14!15!2\dfrac{14!15!}2

  2. B)

    15!16!2\dfrac{15!16!}2

  3. C)

    16!17!2\dfrac{16!17!}2

  4. D)

    17!18!2\dfrac{17!18!}2

  5. E)

    18!19!2\dfrac{18!19!}2

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