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c. 180°

d. 360°
Solution. In 12 hour an hour­hand rotates by 360° i.e. one complete revolution.
Hence in one hour it does

Therefore in 12 hours it will cover, 30°× 12=360°
Answer. d

6. A hunter kills half of the birds on a particular tree after some time he comes back and kills one­third of the remaining birds, if 10 birds are left in the

end then what was the original number of birds on the tree.

a. 10
b. 20
c. 30

d. 40
Solution. Let x be the original number of birds

Birds left after the hunter killed half of them = x/2

Bird left after killing one­third of the remaining =

Now x/3 = 10
Hence, x = 30
Answer. c

7. Ram, Ramesh and Rakesh share out a certain sum of money between them. Ram gets 35%, Ramesh gets 3/5 and Rakesh gets Rs 125.

How much is the original sum of money?

a. 1500

b. 1800
c. 2000
d. 2500
Solution. 35% = 7/20 and 3/5 = 12/20 ie 19/20 in total

Ramesh’s share of Rs 125 must therefore be 1/20

Total sum of money, therefore, is Rs 125 × 20 = 2,500
Answer. d

8. P and Q started a business investing Rs 85 000 and Rs 15 000 respectively. In what ratio the profit earned after 2 years be divided between P and Q

respectively?

a. 3:4
b. 3:5