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Mathematics 20 Online
OpenStudy (anonymous):

Find the missing number in this sequence: 1, 3, 6, __, 15, 21, ... A) 8 Eliminate B) 10 C) 12 D) 14

OpenStudy (anonymous):

is c correct

OpenStudy (anonymous):

i dont no im not done witht he test..do you think c is correct

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