This question is based on the pattern of number series. Therefore the next four terms of series are 3, 9, 7, 11, 17, 15, 19, 25, 23, 27. All the option are incorrect.
Given:
3, 9, 7, 11, 17, 15, ...
We need to determined the next four numbers in the pattern of the series.
As the given series is 3, 9, 7, 11, 17, 15, ...
It is observe that, pattern is repeated in series as follows:
- First difference is addition of 6.
- Second difference is subtraction of 2.
- And, then again addition of 4.
Therefore, this pattern is repeated as follows:
3 + 6 = 9
9 - 2 = 7
7 + 4 = 11
Again, 11 + 6 = 17
17 - 2 = 15
15 + 4 = 19
Again repeated, 19 + 6 = 25
25 - 2 = 23
23 + 4 = 27
Therefore the next four terms of series are 3, 9, 7, 11, 17, 15, 19, 25, 23, 27.
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