Question

Study these groups of objects. In each, one object does not belong in the group.

Group I	Group II	Group III
cotton	wood	paper
sponge	iron	wood
stone	aluminium	cloth
silk	copper	glass

Which objects do not belong in these groups?
(a) stone, wood, paper
(b) stone, copper, glass
(c) sponge, wood, glass
(d) stone, wood, glass

Answer 1

(d) stone, wood, glass
Group I comprises soft objects, therefore stone is the odd one out. Group II has metals, therefore, wood is the odd one among them, Group III includes opaque and inflammable objects, and thus, glass is the odd one.