2807, 1400, 697, 347, 171, 84, 41, 20 · ABC26GN5526
Subject: General Aptitude · Chapter: Odd Man Out and Series
2807, 1400, 697, 347, 171, 84, 41, 20
(a)697
(b)347
(c)171
(d)84
(e)41
Answer
Explanation
7th term = (8th term) × 2 + 1 = 20 × 2 + 1 = 41; 6th term = (7th term) × 2 + 2 = 41 × 2 + 2 = 84; 5th term = (6th term) × 2 + 3 = 84 × 2 + 3 = 171; 4th term = (5th term) × 2 + 4 = 171 × 2 + 4 = 346. 4th term should be 346 instead of 347.
Explanation as extracted from the printed page; notation may be imperfect.
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