Find geometric mean of first six natural numbers.
30
26.8
35
25
First six natural numbers are 1, 2, 3, 4, 5, 6.
So, their geometric mean = √1×2×3×4×5×6
= √720
= 26.8
Find the mean of: (i) First eight natural numbers
(ii) First ten odd numbers
(iii) First five prime numbers
(iv) First six even numbers
(v) First seven multiples of 5.
(vi) Factors of 20
(vii) All prime numbers between 50 and 80