Answer: B) 117 Explanation: Square units 13 by 9 of an office means office of length 13 units and breadth 9 units.   Now its area is 13x 9 = 117 square units or units square.

Answer: A) TRUE Explanation: True, Air is a Mixture. Air is considered as mixture for the following reasons ; 1. Air can be separated into its components like N2, O2 , Argon and CO2 by the process of fractional distillation of liquid air. 2. Air shows the properties of all the gases present in the atmosphere. For example : Oxygen is good Supporter of combustion. Hence air also is good supporter of combustion. 3. Air does not have a fixed formula. 4. Air has a variable composition because air at different places contains different amount of gases. 5. Heat or Light energy is neither absorbed nor released when air is prepared physical by mixing required amount of gases . 6. Mixture does have fixed boiling Point. It holds good in case of liquid air.

Answer: B) Africa Explanation: We know that, there are 7 continents in the world. They are : Asia, Africa, Australia, North America, South America, Europe and Antarctica.   Africa - 53 countries Asia - 48 countries Europe - 45 countries Antarctica - 0 countries   Hence, the continent Africa has most number of countries with 53 countries and in second place Asia has 48 , third Europe has 45 countries.

Answer: B) 2400 Explanation: Given (49.001)2  = ? => =~ 49 x 49 =~ 2401 =~ 2400

Answer: A) 1 : 2 Explanation: 6M + 3B = 4(1M + 1B)6M + 3B = 4M + 4B2M = 1B M/B = 1/2

Answer: B) Rani Lakshmi Bai Explanation:

Answer: A) H S Prannoy Explanation: H S Prannoy has won the men’s singles title at the 82nd Senior National Championship Senior National Badminton Championships in Nagpur, Maharashtra on November 8, 2017. He defeated higher ranked Kidambi Srikanth in the final by 21- 15, 16- 21, 21-7.

Answer: C) DNA replication Explanation: S-phase (synthesis phase) is the part of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase. Precise and accurate DNA replication is necessary to prevent genetic abnormalities which often lead to cell death or disease.