Curioustab
Aptitude
General Knowledge
Verbal Reasoning
Computer Science
Interview
Aptitude
General Knowledge
Verbal Reasoning
Computer Science
Interview
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Verbal Reasoning
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Series Completion
3, 7, 15, 39, 63, 127, 255, 511
15
39
63
127
Show Answer
Correct Answer:
39
Explanation:
The correct pattern is x 2 + 1.
So, 39 is wrong and must be replaced by (15 x 2 + 1) i.e. 31.
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