[Solution] – Saturday CSAT Quiz #3

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[Solutions]

ANSWER  KEY

Ans1.  C |Ans2.  A |Ans3.  C    |Ans4.  A   |Ans5.  D|Ans6.  C|Ans7.   C| Ans8.  D|Ans9.  D|Ans10.  D

Explanations

Ans.1)
Let the amounts invested in A,B and C be p,q and r respectively
Then  (p x 2 x 5) / 100 = (q x 3 x 5) / 100 = (r x 4 x 5) / 100 = Say k
Thus p = 10k , q = (20k)/3 and r= 5k
So p : q : r =  10k : (20/3)k : 5k => p : q : r = 30 : 20 : 15 => p : q : r = 6 : 4 : 3
Hence the  correct option is C

Ans.2)
The smallest  interval after which all lights change  together is the lowest common denominator of their respective times to change i.e. LCM of 24, 72 and 120 which comes out to be 360 seconds i.e 6 minutes.
Thus they will all change simultaneously after 6 minutes from  10 : 54 : 00 which is 11:00:00
Hence the  correct option is A

Ans. 3)
Lets define expenditure (E) as No of quantity  consumed (Q) x Price of one quantity(P).
Thus, as per question expenditure is same in both cases i.e  E = Q1 x P1 = Q2 x P2
Now consumption by 20 % i.e Q2 = Q1 + 0.2 Q1 = 1.2  Q1 .
Hence from above equation we get P2 =(5/6)P1. Thus decrease in consumption is P1-(5/6)P1=P1/6
Now percentage decrease is ( (P1/6) /  P1 )x100 = 16.67 %
Hence the  correct option is C

 Ans.4),  Ans.5) and Ans.6)

GIVEN :: Rama and Mohan are a married couple having two daughters named Smita and Devika.  Devika is married to a man who is the son of Madhu and Jeevan .Romila is the daughter of Aman. Krishna who is Aman’s sister is married to Sunil and has two sons Anuj and Ankur. Ankur is grandson of Madhu and Jeevan.

From the information given above, we can conclude the following ::

1. Rama and Mohan have two children namely Smita and Devika
2. Devika is married to a male, say X, who is the son of Madhu and Jeevan.
3. Madhu and Jevaan have two more children (apart from X) namely Krishna and Aman. Thus Madhu and Jeevan have three children namely X, Krishna and Aman. Thus X, Krishna and Aman and siblings.
4. Krishna is married to Sunil and they have two children namely Ankur and Anuj.
5. Aman has one child called Romila.

6.Thus Ankur, Anuj and Romila are the grandchildren of Madhu and Jeevan.

Ans.4)
Thus Krishna’s   brother (X) is the husband of Devika. Hence Krishna is the sister-in-law of Devika
Hence the  correct option is A

Ans.5) We know that Krishna and Aman are siblings.Also Anuj is Krishna’s son and Romila is Aman’s daughter. Thus Anuj and Romila are Cousins.
Hence the  correct option is D

 Ans.6)
Option a)  Anuj is son of Smita./ WRONG. / Anuj is son of Krishna and Sunil. Hence rejected.
Option b) Romila is the cousin of Krishna. /WRONG./Krishna is Romila’s aunt.Hence Rejected.
Option c) Madhu is Sunil’s mother-in-law./CORRECT./Accepted.
Option d) Jeevan is Devika’s maternal uncle./WRONG/Jeevan is the Father-in-law of Devika. Rejected.
Hence the  correct option is C

Ans.7)
Except Option (C) all other options are out of context and do not confirm with what has been explicitly stated in the passage. Option C is true and can be seen stated in the lines of passage which says “Dolphins are regarded as the friendliest creatures in the sea and stories of them helping drowning sailors have been common since Roman times”
Hence correct option is C.

Ans.8)
Except Option D. all other options are out of context and do not confirm with what has been explicitly stated in the passage. Option D is true and can be seen stated in  lines of passage which says “Certainly the most common argument in favor of man’s superiority over them that we can kill them more easily than they can kill us is the least satisfactory. On the contrary, the more we discover about these remarkable creatures, the less we appear superior when we destroy them”.
Hence correct option is D.

Ans.9)
Except Option D. all other options are out of context and do not confirm with what has been explicitly stated in the passage. Option D is true and can be seen stated in last line of passage which says “They look after other dolphins when they are ill, care for pregnant mothers and protect the weakest in the community, as we do”.
Hence correct option is D.

Ans.10)
Both 1 and 2 look very tempting to conclude from the passage but again they do not confirm with what has been explicitly stated in the passage. For ex– 1.) can be negated  because nowhere in the passage does the author has discussed the mode of communication via sound waves of high frequency. Thus we don’t know for sure. Also 2.) can be negated because nowhere in the passage does the author has the author  compared the complexity of Dolphin’s society with that of human society.
Hence correct option is D.