Answer: C) 9 & 21 Explanation: Let the two numbers be x and y Given x : y = 3 : 7 .....(1) Now, x+6 : y+6 = 5 : 9 .....(2) From (1), x = 3y/7 From (2), 5y - 9x = 24 => 5y - 9(3y/7) = 24 => y = 21 => From(1), x = 9 Hence, the two numbers be 9 and 21

Answer: D) 90 Explanation: Let 'x' be the number of new Rs.2000 notes. Given for one new 2000 note there are three old 500 notes. i.e, 3x Given 10 more new Rs.2000 notes are added to the collectionand the ratio of new Rs.2000 notes to old Rs.500 notes  x+103x=12⇒x=20 Therefore, number of new Rs.2000 notes =  x+10 = 30. old Rs.500 notes = 3x = 60. Thus, the total number of notes in the collection  = 30 + 60 = 90.

Answer: C) Father-in-law Explanation: "G is father in law of D"G+H means G is father of HH is either son or daughter of GH-R means H is sister of RR@D means R is wife of Dso H and R are sistersand daughters of Gso husband of R i.e. D is son in law of Gor G is father in law of D

Answer: D) February 28 Explanation: National Science Day is celebrated in India on 28 February each year to mark the discovery of the Raman effect by Indian physicist Sir Chandrashekhara Venkata Raman on 28 February 1928.

Answer: B) -2 Explanation: The sum of the oxidation numbers in a compound must equal zero. In the compound hydrogen sulfide, H2S, the two hydrogen atoms have an oxidation number of +1, for a total of +2. Therefore, the oxidation number of sulfur in the compound is -2, and the sum of the oxidation numbers is 0.

Answer: D) 6 Explanation: The process of System development life cycle goes through a series of stages in step wise fashion that almost every developing company follows. Known as the 'software development life cycle,' these six steps include:   1. Planning 2. Analysis 3. Design 4. Development & implementation 5.Testing & deployment and 6. Maintenance.

Answer: A) 15 Explanation: Let number of hit shots be 'X'Let number of miss shots be 'Y'Given X + Y = 40....(1)50X - 10Y = 500.....(2)Solving 1 and 2, we getX = 15 and Y = 25Therefore, number of hits = 15

As per given data, P = 415600, R1= 25% incresed, R2 = 30% decreased Population of the city at the end of the second year=  363650.