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2014 AMC 10A Problems/Problem 8

Revision as of 21:48, 6 February 2014 by TheMaskedMagician (talk | contribs) (→‎Proble)

Problem

Which of the following number is a perfect square?

$\textbf{(A)}\ \dfrac{14!15!}2\qquad\textbf{(B)}\ \dfrac{15!16!}2\qquad\textbf{(C)}\ \dfrac{16!17!}2\qquad\textbf{(D)}\ \dfrac{17!18!}2\qquad\textbf{(E)}\ \dfrac{18!19!}2$

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