(i) 4, 16, 64, 256
GM = ( 4 × 16 × 64 × 256)1/4
= (4 × 42 × 43 × 44)1/4
= (410)1/4
= (220)1/4
=25 = 32
(ii) 1, 2, 4, 8, 16
GM = (1×2×4×8×16)1/5
= (2×22×23×24)1/5
=(210)1/5
=22 = 4
(iii) 2, 79; 0.375, 1000
GM = (2.79×0.375×1000)1/3
log GM = (1/3) (log2.79 + log 0.375 + log1000]