A goldsmith has five gold rings, each having a different weight. They are labelled as D, E, F, G and H. Their peculiarities are given in the following 5 statements.
I. Ring D weighs twice as much as ring E.
II. Ring E weighs four and a half times much as ring F.
III. Ring F weighs half as much as ring G.
IV. Ring G weighs half as much as ring H.
V. Ring H weighs less than ring D but more than ring F.
Which of the following is the lightest in weight ?
Given that,
D = 2E; E = 4.5F; F = G2; G = H2; F < H < D
As D = 2E and E = 4.5F
So, D = 2 × 4.5F = 9F
and also D=9×G2=9G2
[∵ F=G2]
Arrangement of rings to order of their weight in decreasing order : DEHGF
F is the lightest in weight.