16, 33, 65, 131, 261, (.....) · ABC26GN5493

Subject: General Aptitude · Chapter: Odd Man Out and Series

16, 33, 65, 131, 261, (.....)

(a)523

(b)521

(c)613

(d)721

Answer

Answer (as printed): A

Explanation

Each number is twice the preceding one with 1 added or subtracted alternately. So, the next number is (2 × 261 + 1) = 523.

Explanation as extracted from the printed page; notation may be imperfect.

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