ABC26GN5493 · Odd Man Out and Series

Subject: General Aptitude · Chapter: Odd Man Out and Series · Exam: · Marks: · Difficulty:

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.