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OpenStudy (goformit100):
Look at this series: 21, 9, 21, 11, 21, 13, 21, ... What number should come next? A. 14 B. 15 C. 21 D. 23
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OpenStudy (goformit100):
@yrelhan4
OpenStudy (yrelhan4):
answer sarah.. quick. :P
OpenStudy (anonymous):
Everyother number stays the same (21) as the others go up by two. B) 15
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