What will come in place of the question mark (?) in each of the following series?

28, 25, 5, 21, 18, 5, 14, ?

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None of these

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Solution

The correct option is A
11

This is an alternating subtraction series with the interpolation of a random number, 5, as every third number.
In the subtraction series, 3 is subtracted consecutively, and so on.

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