Look at this series: 21, 9, 21, 11, 21, 13, 21, ... What number sho – McqOptions

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1.	Look at this series: 21, 9, 21, 11, 21, 13, 21, ... What number should come next?
A.	15
B.	20
C.	25
D.	30
Answer» B. 20

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