What is the Geometric mean of 24, 27 and 72?
The Usual Method
First get the factors of each of the numbers
Geometric mean for them is given by:
= = 4 x 9 = 36
Estimated Time to arrive at the answer = 45 seconds
Simply find the Arithmetic Mean of the numbers:
i.e. = 41
Now you already know that Arithmetic Mean > Geometric Mean > Harmonic Mean, hence, the answer should be less then 41 but close to it. From amongst the options, the only one satisfying this condition is option ‘3’.
Estimated Time to arrive at the answer = 10 seconds