ABC26GN5533 · Odd Man Out and Series

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

5, 8, 20, 42, 124, 246, 736
(a)8
(b)20
(c)42
(d)124
(e)246
Answer
Answer (as printed): B
Explanation
2nd term = (1st term × 2 – 2) = (5 × 2 – 2) = 8; 3rd term = (2nd term × 3 – 2) = (8 × 3 – 2) = 22; 4th term = (3rd term × 2 – 2) = (22 × 2 – 2) = 42; 5th term = (4th term × 3 – 2) = (42 × 3 – 2) = 124 and so on. 20 is wrong.

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

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