In following number series, two terms have been put within brackets. Choose the appropriate option
Look at this series: 40, 40, 47, 47, 54, . . . What number should come next?
Option:
A. 40
B. 44
C. 54
D. 61
Answer: C . 54
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Justification:
This is an alternation with repetition series in which each number repeats itself and then increases by 7.
