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AMC 12 2014b Problem 18

  • Paper

The numbers 11, 22, 33, 44, 55, are to be arranged in a circle. An arrangement is bad\textit{bad} if it is not true that for every nn from 11 to 1515 one can find a subset of the numbers that appear consecutively on the circle that sum to nn. Arrangements that differ only by a rotation or a reflection are considered the same. How many different bad arrangements are there?

(A) 1(B) 2(C) 3(D) 4(E) 5\textbf{(A) }1 \textbf{(B) }2 \textbf{(C) }3 \textbf{(D) }4 \textbf{(E) }5

Dataset text AMC 12 2000 to 2025. Quoted with source.

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B

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