Answer: A) 3.571 Explanation: Here we have 25 divided by 7. 25 will not go directly in 7 Hence, we get the result in decimals. 25/7 = 3.571.

Answer: A) 200 mts Explanation: Length of train A = 48 x 9 x 5/18 = 120 mts Length of train B = 48 x 24 x 5/18 - 120 => 320 - 120 = 200 mts.

Answer: B) Renewable Explanation: Many types of renewable energy resources such as wind and solar energy are constantly replenished and will never run out.

Answer: A) Oxygen Explanation: A greenhouse gas is a gas in an atmosphere that absorbs and emits radiant energy within the thermal infrared range. This process is the fundamental cause of the greenhouse effect.    Carbon dioxide is a main greenhouse gas, found in car exhaust pipes.Methane and nitrous oxide is another type of greenhouse gas. Oxygen is the only clean gas out there because we need it to survive. Therefore, the only gas that is not a greenhouse gas is Oxygen.

Answer: D) 10 days Explanation: Ratio of efficiencies of Priya and Sai is Sai : Priya = 160 : 100 = 8 : 5 Given Priya completes the work in 16 days Let number of days Sai completes the work be 'd' => 5×16 = 8×d d = 10 days. Therefore, number of days Sai completes the work is 10 days.

Answer: D) Daughter-in-law Explanation:         GM    GMA ---- B ---- E         |         |         C         |         |         D (Grand son or daughter)

Answer: A) 7.11 Explanation: 16 of 225 is =  16 = p × 225100p = 1600225 = 7.1111

Answer: B) 109.9446 Explanation: The term gram formula mass is synonymous with molecular mass. So, to get this, we must add molar mass of all the elements in this compound.   Given compound is Lithium Sulphate - Li2SO4 Elemental calculation :: Li  -  Lithium   -   6.941    -     2   -   13.88200 %S  -  Sulfur     -    32.065   -    1   -   32.065 %O  -  Oxygen   -   15.9994  -    4   -   63.9976 % Now, total = 12.6264 + 29.1647 + 58.2090 = 109.9446    Hence, the gram formula mass of Li2SO4 = 109.9446.