521: If a gas is compressed to half of its original volume at 27°C, to what temperature should it be heated to make it occupy its original volume ?
(a) 327°C
(b) 600°C
(c) 54°C
(d) 300°C
522: Which of the following pairs are correctly matched?
Publication : Group
1. Sportstar : The Hindu Publication group
2. Business World : ABP group
3. The Week : Malayala Manorama publication group
4. Reader's Digest : Indian Express publication group
Select the correct answer using the codes given below:
(a) 1 and 3
(b) 2 and 4
(c) 1, 2, and 3
(d) 1, 2, 3 and 4
523: In the context of Indian wild life, the flying fox is a
(a) Stork
(b) Bat
(c) Vulture
(d) Kite
524: 50 men or 80 women can finish a job in , 50 days. A contractor deploys 40 men and 48 women for this work, but after every duration of 10 days, 5 men and 8 women are removed till the work is completed. The work is completed in:
(a) 45 days
(b) 50 days
(c) 54 days
(d) 62 days
525: A trader loses 20 per cent by selling an article for Rs. 480. If he is to gain 20 per cent, he should sell it for rupees ______
(a) 520
(b) 600
(c) 720
(d) 800