ABC26GN5499 · Odd Man Out and Series

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

7, 26, 63, 124, 215, 342, (.....)
(a)481
(b)511
(c)391
(d)421
Answer
Answer (as printed): B
Explanation
Numbers are $(2^3 – 1), (3^3 – 1), (4^3 – 1), (5^3 – 1), (6^3 – 1), (7^3 – 1)$ etc. So, the next number is $(8^3 – 1) = (512 – 1) = 511$.

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

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