What will come in place of question mark (?) in the following number series.?
11, 13, 16, 20, ??
The difference between consecutive terms of the number series is increasing by one.
For example, 13-11 = 2
16-13 = 3
20-16 = 4
So, the number next in series is 20+5 = 25. As it is not in the given options, the correct answer is option (e)
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