Answer: B) 40 Explanation: The third proportional of two numbers p and q is defined to be that number r such that p : q = q : r.   Here, required third proportional of 10 & 20, and let it be 'a' => 10 : 20 = 20 : a 10a = 20 x 20 => a = 40   Hence, third proportional of 10 & 20 is 40.

Answer: B) 1966 Explanation: The Green Revolution in India refers to a period of time when agriculture in India changed to an industrial system due to the adoption of modern methods and technology such as high yielding variety (HYV) seeds, tractors, pump sets, etc. Green revolution was started by Dr.M.S. Swaminathan.   The new agricultural strategy was adopted in India during the Third Plan, i.e., during 1960s. As suggested by the team of experts of the Ford Foundation in its report "India’s Crisis of Food and Steps to Meet it" in 1959 the Government decided to shift the strategy followed in agricultural sector of the country.   During the period of mid-1960s, Prof. Norman Borlaug of Mexico developed new high yielding varieties of wheat and accordingly various countries started to apply this new variety with much promise. Similarly, in the kharif season in 1966, India adopted High Yielding Varieties Programme (HYVP) for the first time.

Answer: D) Pressure Explanation: Pressure is Not a form of Energy.   Energy : It is defined as the ability to do work. Energy comes in two basic forms. They are : 1. Potential Energy 2. Kinetic Energy   Potential Energy is any type of stored energy. It can be chemical, nuclear, gravitational, or mechanical. Kinetic Energy is found in movement. An airplane flying or a meteor plummeting each have kinetic energy. Even the tiniest things have kinetic energy, like atoms vibrating when they are hot or when they transmit sound waves. Electricity is the kinetic energy of flowing electrons between atoms.

Answer: D) 39 Explanation: Let the two-digit number be 10a + ba + b = 12 --- (1)If a>b, a - b = 6If b>a, b - a = 6If a - b = 6, adding it to equation (1), we get2a = 18 => a =9so b = 12 - a = 3Number would be 93.if b - a = 6, adding it to the equation (1), we get2b = 18 => b = 9a = 12 - b = 3.Number would be 39.There fore, Number would be 39 or 93.

Answer: C) 6 hrs Explanation: Suppose A, B and C take x, x/2 and x/3 respectively to finish the work.  Then, (1/x + 2/x + 3/x) = 1/2  => 6/x = 1/2      => x = 12  So, B takes 6 hours to finish the work.

Answer: B) Photosynthesis Explanation: Photosynthesis process removes carbon dioxide from the atmosphere. Green plants remove carbon dioxide from the atmosphere by photosynthesis.  The level of carbon dioxide in the atmosphere is maintained by several processes, including photosynthesis, respiration and combustion.

Answer: B) Arunachal Pradesh Explanation: Arunachal Pradesh State has been declared as the Open Defecation Free state.

9 P in SS  is a short form for 9 Planets i  Solar System.   There are many more of this kind. Some of them are:   1. 7 C in a R        -    7 Colours in a Rainbow 2.  90 D in a R A   -    90 Degrees in a Right Angle 3.  52 W in a Y     -    52 Weeks in a Year 4.  5 C in an OF 5.  12 S of the Z