101: How many minimum number of colours will be required to paint all the sides of a cube without the adjacent sides having the same colours?
(a) 3
(b) 4
(c) 5
(d) 6
102: Heavy rainfall affects soil by:
(a) Increasing its acidity
(b) Increasing its alkalinity
(c) Reducing its fertility
(d) None of these
103: Centre-State financial relations are looked after by the:
(a) Finance Commission
(b) Sarkaria Commission
(c) Ministry of Finance
(d) Planning Commission
104: Consider the following statements :
I. Tapeworm is a hermaphrodite.
II. Round-worm has separate sexes.
III. Filaria is caused by a nematode.
IV. Guinea-worm is an annelid.
Which of these are correct ?
(a) I and II
(b) I, II and III
(c) III and IV
(d) II, III and IV
105: Water is filled in a container in such a manner that its volume doubles after every five minutes. If takes 30 minutes for the container to be full, in how much time will it be one-fourth full ?
(a) 7 minutes and 30 seconds
(b) 10 minutes
(c) 20 minutes
(d) 25 minutes