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M26-15

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Math Expert
Joined: 02 Sep 2009
Posts: 94605
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Given Kudos: 86734
Math Expert
Joined: 02 Sep 2009
Posts: 94605
Own Kudos [?]: 643494 [4]
Given Kudos: 86734
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Posts: 94605
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Julie is arranging M marbles in a row following a repeating pattern: blue, white, red, green, black, yellow, pink. If the sequence starts with a blue marble and ends with a red marble, which of the following could be the value of M ?

We have 7 marbles in a pattern, the row starts with a blue and ends with the red so M=7n+3
n=1=>M=10
n=2=>M=17
n=3=>M=24
n=4=>M=31
n=5=>M=38=>C
n=6=>M=45
n=7=>M=52