181. The diameter of a circle is 10 cm. "P" is the point lying outside the circle. From that point "P" two tangents are drawn to the circle. The length of each tangent is 12 cm. What is the distance between "P" and the centre of the circle? A.12 cm B. 13 cm C.15 cm D. 10 cm 182. Find the average of first n natural numbers A. n ( n +1)/2 B. n ( n + 1)(2 n +1) / 2 C. n +1/2 D. n² 183. A gardener wanted to reward a girl for her good deeds by giving some apples. He gave 2 apples on the first day, 4 on the second day, 8 on the third day, 16 apples on the fourth day and so on for ten days. How many apples did she get from the gardener at the end of the tenth day A.1024 B. 2060 C. 1760 D. 2046 184. Using the clay, Malar makes a cone, a hemisphere and a cylinder have equal bases and the heights of the cone and a cylinder are equal. They same as the common radius then find the ratio of their respective volumes A.1 : 2 : 3 B.1 : 2 : 4 C. 1:2:5 D. 1: 2: 6 185. If A and B can do a work in 6 days. B and C can do it in 12 days, C and A can do it in 4 days how many days it would take to finish the same work by all the three together? A. 8 days B.4 days C. 10 days D.2 days 186. A and B can complete a work individually in 12 days and 18 days. They started doing the work together but after 4 days A had to leave and B alone completed the remaining work. The whole work was completed in A. 30 days B. 20 days C. 12 days D. 8 days 187. Match List I with List II and select the correct answer using the codes given below: List I - planets List II — Revolution Period a.Mars 1. 88 days b.Earth 2. 225 days c. Mercury 3. 687 days d.Venus 4. 365 days _abcd A.3421 B.3412 C.2431 D.2413 188. The term 'seismic gap' refers to A. A region B. A period C.A disaster D. Seismic prediction 189. Who won the IAAF best female Athletic of the year award in 2016? A. Yelena Isinbayeva B. Almaz Ayana C. Shelly Ann Fraser Pryce D. Valerie Adams 190. Match the Field with Nobel Prize Winners 2016 and select the correct answer using the codes given below: Field - Nobel Prize Winner a.Peace 1. Jean Pierre Sauvage, Fraser Stoddart, Bemad L. Feringa b.Medicine 2. Yoshinori Ohsumi c. Physics 3. Juvan Manuel Santos d.Chemistry 4.David Thouless, Duncan M. Haldane, Michael Kesterlitz _abcd A.3421 B.1324 C.3241 D.4312