Look at this series: 21, 9, 21, 11, 21, 13, 21, ... What number should come next?
A.14
B.15
C.21
D.23
Answers
Answered by
0
the answer is 15, because 21 is alternately constant and the middle term is increasing by +2 .....
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Answered by
1
difference between terms which occupy even places is 2 so next number of series will be 15.
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