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# What is the least number of marbles required to fill 7 holes so that

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Re: What is the least number of marbles required to fill 7 holes so that [#permalink]
Bunuel wrote:
What is the least number of marbles required to fill 7 holes so that no adjacent holes have the same number of marbles and no hole is left empty?

A. 7
B. 10
C. 11
D. 12
E. 28

1,2,1,2,1,2,1
=sum all
=> 10
IMO B
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Re: What is the least number of marbles required to fill 7 holes so that [#permalink]
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Re: What is the least number of marbles required to fill 7 holes so that [#permalink]
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