1, 2, 6, 15, 31, 56, 91 · ABC26GN5477

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

1, 2, 6, 15, 31, 56, 91

(a)31

(b)91

(c)56

(d)15

Answer

Answer (as printed): B

Explanation

Add 12, 22, 32, 42, 52, 62. So, 91 is wrong.

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

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