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CSAT 2021 Practice Questions

1.  A watch which loses time uniformly is 7 minutes fast at 8:30 AM Tuesday and becomes 5 minutes slow at 8:30 AM next Wednesday. When did the watch show the correct time? 

(a) It didn’t show the correct time ever 

(b) 8:30 AM Saturday 

(c) 8:30 PM Saturday 

(d) 12:30 AM Sunday

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2. What should come in place of question mark in the following number series 

61 68 129 197 326 ? 849 

(a) 579

(b) 523

(c) 780

(d) 979

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3. There is a difference in how commercial agents and economic agents perceive productivity. For commercial agents, productivity is a standalone concept that has little interactive value with a background that is more or less nonessential for such productivity. For economic agents, however, productivity can only make sense if it is linked to all possible factors within a milieu, the material product that is received at the end of the process is not merely equal to its material value but of is social, political and ecological value.

According to the passage, which among the following is advocated as a better definition of productivity, from the perspective of a society?

(a) Commercial definition of productivity, as perceived by the commercial agent

(b) Economic definition of productivity, as perceived by the economic agent

(c) Both (a) and (b)

(d) Neither (a) nor (b)


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Spocksaid

2. What should come in place of question mark in the following number series 

61 68 129 197 326 ? 849 

(a) 579

(b) 523

(c) 780

(d) 979

B. 523

Nx+2= 2Nx+ [Nx+1- Nx]

Correct 

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1.  A watch which loses time uniformly is 7 minutes fast at 8:30 AM Tuesday and becomes 5 minutes slow at 8:30 AM next Wednesday. When did the watch show the correct time? 

(a) It didn’t show the correct time ever 

(b) 8:30 AM Saturday 

(c) 8:30 PM Saturday 

(d) 12:30 AM Sunday

D

Correct

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3. There is a difference in how commercial agents and economic agents perceive productivity. For commercial agents, productivity is a standalone concept that has little interactive value with a background that is more or less nonessential for such productivity. For economic agents, however, productivity can only make sense if it is linked to all possible factors within a milieu, the material product that is received at the end of the process is not merely equal to its material value but of is social, political and ecological value.

According to the passage, which among the following is advocated as a better definition of productivity, from the perspective of a society?

(a) Commercial definition of productivity, as perceived by the commercial agent

(b) Economic definition of productivity, as perceived by the economic agent

(c) Both (a) and (b)

(d) Neither (a) nor (b)


What is the correct answer ? 

B is correct. 

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4. The action-packed sequence of the events last evening had left the entire town rapt in thrill and awe, it was one of those incidents where a comedy of errors had taken control of all action. It seemed like an endless hustle between two very well prepared competitors in the game of tennis or chess, the fact that it was something through which no one came out hurt was also delightful yet surprising.

According to the passage, which of the following is correct?

(a) The passage narrates a sporting event

(b) The passage narrates a cultural event that is undertaken often by the town

(c) The passage narrates a fictional storyline

(d) The passage narrates an event of excitement and thrill, which achieved some value for the people, though it could have cost them too if it had gone wrong

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5. Two students appeared at an examination. One of them secured nine marks more than the other and his marks were 56% of the sum of their marks. The marks obtained by them are:

(a) 42, 33

(b) 32, 23

(c) 45, 36

(d) 84, 75

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6. How many keystrokes are needed to type numbers from 1 to 1000?

A. 3001

B. 2893

C. 2704

D. 2890

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5. A

6. A

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7. In an election contested by two parties, Party D secured 12% of the total votes more than Party R. If party R got 132,000 votes, by how many votes did it lose the election?

A. 240,000

B. 300,000

C. 168,000

D. 36000

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8. The difference between the value of a number increased by 12.5% and the value of the original number decreased by 25% is 30. What is the original number?

A. 60

B. 80

C. 40

D. 120


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8. The difference between the value of a number increased by 12.5% and the value of the original number decreased by 25% is 30. What is the original number?

A. 60

B. 80

C. 40

D. 120


B:

1.125x - 0.75x= 30

=>x= 80

Correct. 

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36000 is correct. 

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19. In a recent survey 40% houses contained two or more people. Of those houses containing only one person 25% were having only a male. What is the percentage of all houses which contain exactly one female and no males (Assume that each house contains at least one person)? 

(a) 60 

(b) 40 

(c) 45 

(d) 75

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19. In a recent survey 40% houses contained two or more people. Of those houses containing only one person 25% were having only a male. What is the percentage of all houses which contain exactly one female and no males (Assume that each house contains at least one person)? 

(a) 60 

(b) 40 

(c) 45 

(d) 75

C. 45


Right!

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20. Set A contains all the even numbers between 2 and 50 inclusive. Set B contains all the even numbers between 102 and 150 inclusive. What is the difference between the sum of elements of set B and that of set A?

a. 2500

b. 5050

c. 11325

d. 6275

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20- a

No. Of terms between 2 & 50= 25.

Sum= (102-2) + (104-4) + .......+ (150-50)

=>Sum= 100*25

=2500

Correct. 

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21. When the digits of two-digit numbers are reversed, the number increases by 27, the sum of such two-digit numbers


(a) 235


(b) 249


(c) 213


(d) 180

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21. When the digits of two-digit numbers are reversed, the number increases by 27, the sum of such two-digit numbers


(a) 235


(b) 249


(c) 213


(d) 180

21. (B)


Correct. 

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22. 

Find the missing number. 

a) 12

(b) 16

(c) 32

(d) 48

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23. If the first day of the year (other than the leap year) was Sunday, then which was the last day of that year?


(a) Monday


(b) Sunday


(c) Saturday


(d) None of these

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22. 

Find the missing number. 

a) 12

(b) 16

(c) 32

(d) 48

(d) 48

Opposite number is 4 times the number.

Hence, 12*4= 48

Right. 


22. D

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23. If the first day of the year (other than the leap year) was Sunday, then which was the last day of that year?


(a) Monday


(b) Sunday


(c) Saturday


(d) None of these

@upsc2020 - Option -  b (Sunday) ?

Sunday is Right. 

23 B

@SHATANSH_SHARMA 

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24. What is the code for 'sky' in the code language?

Statements:

1. In the code language, 'sky is clear' is written as 'de ra fa'.


2. In the same code language, 'make it clear' is written as 'de ga jo'.


(A) I alone is sufficient while II alone is not sufficient


(B) II alone is sufficient while I alone is not sufficient


(C) Either I or II is sufficient


(D) Neither I nor II is sufficient



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25. In a certain code '13' means 'stop smoking' and '59' means 'injurious habit'. What is the meaning of '9' and '5' respectively in that code?


1.'157' means 'stop bad habit'.


2.'839'means 'smoking is injurious'.


(A)  if the data in statement I alone are sufficient to answer the question


(B)  if the data in statement II alone are sufficient answer the question


(C)  if the data either in I or II alone are sufficient to answer the question


(D)  if the data even in both the statements together are not sufficient to answer the question;



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26. How many children are there between P and Q in a row of children?


Statements:


1. P is fifteenth from the left in the row.


2. Q is exactly in the middle and there are ten children towards his right.


(A) I alone is sufficient while II alone is not sufficient


(B) II alone is sufficient while I alone is not sufficient


(C) Either I or II is sufficient


(D) Both I and II are sufficient

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With respect to Passage comprehension,  can anyone write in 1-2 sentences what exactly the following questions mean.


Questions about INFERENCE-

1. Correct Inference of the passage?

2. Logical and rational inference  of the passage?

3. Critical Inference  of the passage?


Questions about assumptions-

1.  What are the valid assumptions about the passage?

2. Which of the following Assumptions made in the passage are correct?

3. Most logical and rational assumption about the passage?


Questions about Message/idea/views-

1. Author holds the view that?

2. Rational and crucial message of the passage?

3. Main idea of the passage?

4. Essential message of the passage?

5. Critical message of the passage?

6. Crux of the passage?

7. Best explaination of the passage?

8. What does the passage imply?

9. Keynote emerging from the passage?

10. Passage seems to suggest that...?

11. Passage seems to argue that...?


Questions about Implication-

1. Important implication  of the passage?


Question about corollary-

1. Most logical corollary to the passage?


If you know about any book or notes where the meaning of the above questions(words) are explained, please suggest.

In my opinion,

Inference: It is YOUR conclusion drawn on the basis of given facts.  Inference is always with respect to reader and more than one inference can be drawn on the basis of a given fact. Deriving inferences in reading requires you to grasp the meaning of a passage without being given all the information.

Assumption: An assumption is a hidden or an unstated premise. Being a premise means that the assumption must be true for the conclusion to hold true. An assumption question necessarily needs to have a conclusion in the passage or the question stem. 

Main Idea: Significant or central theme of the piece taken as a whole and taking everything into account.

Implication: idea that an author will suggest but not state directly.

Logical Corollary: an inference that can be derived from a previous true inference. 


Happy to receive more inputs wrt these. 

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24. What is the code for 'sky' in the code language?

Statements:

1. In the code language, 'sky is clear' is written as 'de ra fa'.


2. In the same code language, 'make it clear' is written as 'de ga jo'.


(A) I alone is sufficient while II alone is not sufficient


(B) II alone is sufficient while I alone is not sufficient


(C) Either I or II is sufficient


(D) Neither I nor II is sufficient



D

Correct. 

24. D

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25. In a certain code '13' means 'stop smoking' and '59' means 'injurious habit'. What is the meaning of '9' and '5' respectively in that code?


1.'157' means 'stop bad habit'.


2.'839'means 'smoking is injurious'.


(A)  if the data in statement I alone are sufficient to answer the question


(B)  if the data in statement II alone are sufficient answer the question


(C)  if the data either in I or II alone are sufficient to answer the question


(D)  if the data even in both the statements together are not sufficient to answer the question;



C

25. C 

Correct. 

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26.  I ) 'A * B' means 'A is father of B'

( II ) 'A – B' means 'A is sister of B'

( III ) 'A + B' means 'A is mother of B'

( IV ) 'A/B' means 'A is sister of B'

In the expression D + F * O / P, how is O related to D?

A. Grand daughter

B. Son

C. Grand son

D. Daughter

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27. If in a certain language, MADRAS is coded as NBESBT, how is BOMBAY coded in that code?

A. CPNCBX

B. CPNCBZ

C. CPOCBZ

D. CQOCBZ

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28. If PAINT is coded as 74128 and EXCEL IS CODED AS 93596 then how would you encode ACCEPT?

A. 455978

B. 547978

C. 554978

D. 735961

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BGPsaid

26.  I ) 'A * B' means 'A is father of B'

( II ) 'A – B' means 'A is sister of B'

( III ) 'A + B' means 'A is mother of B'

( IV ) 'A/B' means 'A is sister of B'

In the expression D + F * O / P, how is O related to D?

A. Grand daughter

B. Son

C. Grand son

D. Daughter

A. GrandDaughter

Correct. 

D + F * O / P

D + F means D is mother of F

F * O means F is father of O

O /P means O is sister of P

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27-28 answers pending!

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27-B, 28-A

Correct.

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29. During a particular period, water enters a partially filled reservoir at a constant rate through a mountain stream. At the same time, water is pumped out of the reservoir at a constant rate through an outlet pipe. At what rate, in gallons per minute, is the amount of water in the reservoir increasing?


(1) The amount of water initially in the reservoir is 1800 gallons.


(2) Water is pumped into the reservoir at a rate of 8 gallons per minute and out of the reservoir at a rate of 20 gallons every 3 minutes.


A) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.


B) Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.


C) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.


D) EACH statement ALONE is sufficient.

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30.SENTENCE CORRECTION (MARKED IN ITALICS)

Investigations along the Solo river in Indonesia have led some archeologists to debunk the idea of an erain which Homo Erectus had still survived in then Homo Sapiens’ inhabited areas.


A) in which Homo Erectus had still survived in then Homo Sapiens’ inhabited areas


B) in which Homo Erectus still survived in areas inhabited by Homo Sapiens


C) when Homo Erectus still survived where there were areas inhabited by Homo Sapiens


D) when Homo Erectus had still survived in current Homo Sapiens areas

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31. Recently, scientists determined that great white sharks can live over 70 years, much longer than had been previously thought. They made the discovery by examining the layers of different colors that accumulated on the shark’s teeth over the years. In the 1950s, atomic bomb testing produced unusually large amounts of carbon-14, which fell from the atmosphere into the ocean and accumulated as a distinctive layer on the shark’s teeth corresponding to a known period in time. Perplexingly, even though great white sharks live longer than had been expected, some parties maintain that based on the new findings, the great white sharks must be protected from overfishing.


Which of the following, if true, best resolves the discrepancy identified above?


A) Great white sharks need to be protected from overfishing because they are dying rapidly due to poisoning by carbon-14.


B) Great white sharks were determined to live longer than had been previously thought based on the discovery of a carbon-14-rich layer within older sharks’ teeth.


C) Great white sharks are evidently endangered and therefore need to be protected from overfishing.


D) Great white sharks’ longer lifespan implies that they mature more slowly and reproduce more slowly than had previously been assumed.


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BGPsaid

31. Recently, scientists determined that great white sharks can live over 70 years, much longer than had been previously thought. They made the discovery by examining the layers of different colors that accumulated on the shark’s teeth over the years. In the 1950s, atomic bomb testing produced unusually large amounts of carbon-14, which fell from the atmosphere into the ocean and accumulated as a distinctive layer on the shark’s teeth corresponding to a known period in time. Perplexingly, even though great white sharks live longer than had been expected, some parties maintain that based on the new findings, the great white sharks must be protected from overfishing.


Which of the following, if true, best resolves the discrepancy identified above?


A) Great white sharks need to be protected from overfishing because they are dying rapidly due to poisoning by carbon-14.


B) Great white sharks were determined to live longer than had been previously thought based on the discovery of a carbon-14-rich layer within older sharks’ teeth.


C) Great white sharks are evidently endangered and therefore need to be protected from overfishing.


D) Great white sharks’ longer lifespan implies that they mature more slowly and reproduce more slowly than had previously been assumed.


B

D is right. It says that if sharks are older than we thought, there are fewer of them than we thought. That's a good reason to protect them from overfishing.

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BGPsaid

30.SENTENCE CORRECTION (MARKED IN ITALICS)

Investigations along the Solo river in Indonesia have led some archeologists to debunk the idea of an erain which Homo Erectus had still survived in then Homo Sapiens’ inhabited areas.


A) in which Homo Erectus had still survived in then Homo Sapiens’ inhabited areas


B) in which Homo Erectus still survived in areas inhabited by Homo Sapiens


C) when Homo Erectus still survived where there were areas inhabited by Homo Sapiens


D) when Homo Erectus had still survived in current Homo Sapiens areas

A

B is correct. 

Creating a filter: in this question, the construction "in which" may stand out. The answer choices show that "in which" and "when" are alternatives we must choose between. Both phrases, "in which" and "when," convey meaning accurately here. More of a problem is the phrase "in then Homo Sapiens' inhabited areas," which is an awkward string of words.

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BGPsaid

29. During a particular period, water enters a partially filled reservoir at a constant rate through a mountain stream. At the same time, water is pumped out of the reservoir at a constant rate through an outlet pipe. At what rate, in gallons per minute, is the amount of water in the reservoir increasing?


(1) The amount of water initially in the reservoir is 1800 gallons.


(2) Water is pumped into the reservoir at a rate of 8 gallons per minute and out of the reservoir at a rate of 20 gallons every 3 minutes.


A) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.


B) Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.


C) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.


D) EACH statement ALONE is sufficient.

B

Correct. 

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32. In most countries, lower taxes stimulate economic growth, which is an increase of the capacity of an economy to produce goods and services. In the nation of Tattua, economic growth is significantly higher than it is in the nation of Hothal. Clearly, therefore, Tattua's industries must, on the whole, be further advanced technologically than Hothal's are.


The argument is most vulnerable to which of the following criticisms?



a. It offers a conclusion that is no more than a paraphrase of one of the pieces of information provided in its support.


b. It presents as evidence in support of a claim information that is inconsistent with other evidence presented in support of the same claim.


c. It takes one possible cause of a condition to be the actual cause of that condition without considering any other possible causes.


d. It takes a condition to be the effect of something that happened only after the condition already existed.

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33. Sixty-four percent of the members of a study group are aged 30 or older, and 12.5 percent of those individuals aged 30 or older are teachers. If one member of the study group is to be selected at random, what is the probability that the member selected is a teacher aged 30 or older?



a. 0.080


b. 0.100


c. 0.125


d. 0.150

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BGPsaid

33. Sixty-four percent of the members of a study group are aged 30 or older, and 12.5 percent of those individuals aged 30 or older are teachers. If one member of the study group is to be selected at random, what is the probability that the member selected is a teacher aged 30 or older?



a. 0.080


b. 0.100


c. 0.125


d. 0.150

a.) 0.080%

Right. 

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34. The value of an investment decreased from $1,800 to $1,610. Approximately what was the percent decrease in value?


a. 4%


b. 11%


c. 15%


d. 25%


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Please answer the below Questions wrt this image

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A.

In which year was the value per tin the minimum?

A. 1987

B. 1984

C. 1985

D.1983

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B. 

If in 1986 tins were exported at the same rate per tin as in 1985, then what would be the value of exports in 1986? (Crores of Rupees)

A. 400

B. 420

C. 375

D. 352

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50. You are handling a time-bound project. During the project review meeting, you find that the project is likely to get delayed due to lack of cooperation of the team members. You would…
(a) Warn the team members for their non-cooperation.
(b) Look into reasons for non-cooperation.
(c) Ask for the replacement of team members.
(d) Ask for extension of time citing reasons.
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51. You are competing with your batch-mate for the prestigious award to be decided based on an oral presentation. You have been asked by the committee to finish on time. Your friend however, is allowed more than the stipulated time period.

a) Lodge a complaint to chairperson against the discrimination.
b) Not listen to any justification from the committee
c) Ask for withdrawal of your name
d) Protest and leave the place
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52. A person lives in a far off village which is almost two hours by bus. The villager's neighbor is a very powerful landlord who is trying to occupy the poor villager's land by force. You are the District Magistrate and busy in a meeting called by a local Minister. The villager has in all the way, by bus and on foot, to see you and give an application seeking protection from the powerful landlord. The villager keeps on waiting outside the meeting hall for an hour. You come out of the meeting and are rushing to another meeting. The villager follows you to submit his application. What would you do?

(a) Tell him to wait for another two hours till you come back from your next meeting.
(b) Tell him that the matter is actually to be dealt by a junior officer and that he should give the application to him.
(c) Call one of your senior subordinate officers and ask him to solve the villager's problem.
(d) Quickly take the application from him, ask him a few relevant questions regarding his problem and then proceed to the meeting.
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@ishitatri Reviving the thread.

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Can anyone explain why ans is not (a)  when it is mentioned in passage itself.. Inference means conclusion then passage statement should be the answer

Can you please share the passage

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