The Geometric Mean (G.M) for the series 1, 2, 4 is June 8, 2021 – by admin Question: The Geometric Mean (G.M) for the series 1, 2, 4 is A. 2 B. 7/3 C. 3/7 D. 2.5 Answer» a. 2 Note: The above multiple-choice question is for all general and Competitive Exams in India.