221. There are 10 lamps in a hall. Each one of them can be switched on independently. The number of ways in which hall can be illuminated is

Mathematical Reasoning • Combinatorics • DEC 2011

222. How many numbers between 100 and 300 begin or end with 2?

Mathematical Reasoning • Counting • DEC 2011

223. Which is the number that comes next in the following sequence? 2, 6, 12, 20, 30, 42, 56, _____

Mathematical Reasoning • Number Series • DEC 2011

224. Six persons A, B, C, D, E and F are standing in a circle. B is between F and C, A is between E and D, F is to the left of D. Who is between A and F ?

Mathematical Reasoning • Seating Arrangement • DEC 2011

225. The price of petrol increases by 25%. By what percentage must a customer reduce the consumption so that the earlier bill on the petrol does not alter ?

Mathematical Reasoning • Percentage • DEC 2011

226. If Ram knows that y is an integer greater than 2 and less than 7 and Hari knows that y is an integer greater than 5 and less than 10, then they may correctly conclude that

Mathematical Reasoning • Logical Deduction • DEC 2011

227. What is the absolute CO₂ emission from domestic sector?

People, Development and Environment • Environmental Issues • DEC 2011

228. What is the absolute CO₂ emission for combined thermal power and transport sectors?

People, Development and Environment • Environmental Issues • DEC 2011

229. Which of the following pollutants affects the respiratory tract in humans?

People, Development and Environment • Pollutant Health Effects • DEC 2011

230. Which of the following pollutants is not emitted from the transport sector?

People, Development and Environment • Pollutant Sources • DEC 2011

231. Which of the following sources of energy has the maximum potential in India?

People, Development and Environment • Renewable Energy • DEC 2011

232. Which of the following is not a source of pollution in soil?

People, Development and Environment • Soil Pollution • DEC 2011

233. Which of the following is not a natural hazard?

People, Development and Environment • Natural Hazards • DEC 2011

234. Ecological footprint represents

People, Development and Environment • Ecological Footprint • DEC 2011

235. Which is the source of chlorofluorocarbons ?

People, Development and Environment • Pollutant Sources • DEC 2011

236. Which of the following is not a renewable natural resource ?

People, Development and Environment • Natural Resources • DEC 2011

237. Which of the following parameters is not used as a pollution indicator in water ?

People, Development and Environment • Water Pollution Indicators • DEC 2011

238. S and P waves are associated with

People, Development and Environment • Natural Hazards • DEC 2011

239. Match Lists I and II and select the correct answer from the codes given below : List – I (i) Ozone hole (ii) Greenhouse effect (iii) Natural hazards (iv) Sustainable development. List – II (a) Tsunami (b) UV radiations (c) Methane (d) Eco-centrism.

People, Development and Environment • Environmental Issues • DEC 2011

240. Which of the following sampling methods is not based on probability?

Research Aptitude • Sampling Methods • DEC 2011