3, 10, 21, 36, 55, 70, 105 · ABC26GN5484

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

3, 10, 21, 36, 55, 70, 105

(a)105

(b)70

(c)36

(d)55

Answer

Answer (as printed): B

Explanation

The pattern is 1 × 3, 2 × 5, 3 × 7, 4 × 9, 5 × 11, 6 × 13, 7 × 15 etc.

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

Study loop for Odd Man Out and Series