What is the geometric mean of 2 and 8?

The geometric mean of 9 and 81 is

The geometric mean of 9 and 81 is

What is the geometric mean of the data 2, 4, 8, 16, 32 ?

What is the geometric mean of 10, 40 and 60 (appox)?

Sum of first n natural numbers is given by (n(n+1))/(2) . What is the geometric mean of the series 1, 2, 4, 8, ……2^(n)?

What is the geometric mean of the ratio of corresponding terms of two series where G_(1)" and "G_(2) are geometric means of the two series ?