Just tried this in my head with a random n=150. g = 12, since 12x12 = 144, pretty close to 150. 150/12 = 150/(4x3) = 50/4 = 12.5 Average of 12 and 12.5 is 12

Just tried this in my head with a random n=150. g = 12, since 12x12 = 144, pretty close to 150. 150/12 = 150/(4x3) = 50/4 = 12.5 Average of 12 and 12.5 is 12.25. Real answer: 12.247 Amazing!