2012 CSAT APTITUDE AND REASONING
Guest lectures on five subjects viz., Economics, History, Statistics, English and Mathematics have to be arranged in a week from Monday to Friday. Only one lecture can be arranged on each day. Economics cannot be scheduled on Tuesday. Guest faculty for History is available only on Tuesday. Mathematics lecture has to be scheduled immediately after the day of Economics lecture. The English lecture has to be scheduled immediately before the day of Economics lecture.
1.Which lecture is scheduled on Monday?
A.History
B.Economics
C.Mathematics
D.Statistics
Solution: D
To determine the schedule of lectures for each day of the week, let's go through the given conditions step by step:
- Economics cannot be scheduled on Tuesday.
- The History lecture has to be on Tuesday.
- The Mathematics lecture has to be scheduled immediately after the day of the Economics lecture.
- The English lecture has to be scheduled immediately before the day of the Economics lecture.
Based on these conditions, we can determine the schedule:
- Monday: Statistics
- Tuesday: History
- Wednesday: English
- Thursday: Economics
- Friday: Mathematics
2.Which lecture is scheduled between Statistics and English?
A.Economics
B.History
C.Mathematics
D.No lecture
Solution: B
3.Which lecture is the last one in the week?
A.History
B.English
C.Mathematics
D.Economics
Solution: C
4.Which lecture is scheduled on Wednesday?
A.Statistics
B.Economics
C.English
D.History
Solution: C
5.Which lecture is scheduled before the Mathematics lecture?
A.Economics
B.History
C.Statistics
D.English
Solution: A
6.Two glasses of equal volume are respectively half and three-fourths filled with milk. They are then filled to the brim by adding water. Their contents are then poured into another vessel. What will be the ratio of milk to water in this vessel?
Solution: d
The ratio of milk to water in the new vessel will be 5:3.
The first glass is half filled with milk, so it has 1/2 milk and 1/2 water.
The second glass is three-fourths filled with milk, so it has 3/4 milk and 1/4 water.
When the contents of the two glasses are poured into the new vessel, the total amount of milk is 1/2 + 3/4 = 7/4.
The total amount of water is 1/2 + 1/4 = 3/4.
The ratio of milk to water is 7/4 : 3/4 = 5 : 3.
7.Consider the following statements:
1.All machines consume energy
2.Electricity provides energy
3.Electrically operated machines are cheap to maintain
4.Electrically operated machines do not cause pollution.
Which one of the following inferences can be drawn from the above statements?
Solution: d
The correct answer is D. Electrically operated machines are preferable to use.
The statements provide information about the advantages of electrically operated machines. They are cheap to maintain, do not cause pollution, and electricity is a source of energy. This suggests that electrically operated machines are preferable to use.
The other options are not supported by the statements. Option A is incorrect because it is not stated that all machines are run by electric energy. Option B is incorrect because it is not stated that there is no form of energy other than electricity. Option C is incorrect because it is not stated that most machines are operated on electric energy.
8.Examine the following statements:
1.None but the rich ran afford air-travel.
2.Some of those who travel by air become sick
3.Some of those who become sick require treatment
Which one of the following conclusions can be drawn from the above statements?
A.All the rich persons travel by air.
B.Those who travel by air become sick
C.All the rich persons become sick.
D.All those who travel by air are rich
Solution: D
The first statement says that only rich people can afford air travel. This means that if someone is traveling by air, they must be rich. The second statement says that some people who travel by air become sick. This means that not all people who travel by air become sick. The third statement says that some people who become sick require treatment. This means that not all people who become sick require treatment.
Based on these statements, we can conclude that all people who travel by air are rich. However, we cannot conclude that all rich people travel by air, that all people who travel by air become sick, or that all people who become sick require treatment.
9.In five flats, one above the other, live five professionals. The professor has to go up to meet his IAS officer friend. The doctor is equally friendly to all, and has to go up as frequently as go down. The engineer has to go up to meet his MLA friend above whose flat lives the professor's friend.
From the ground floor to the top floor, in what order do the five professionals live?
A.Engineer, Professor, Doctor, IAS officer, MLA
B.Professor, Engineer, Doctor, IAS officer, MLA
C.IAS officer, Engineer, Doctor, Professor, MLA
D.Professor, Engineer, Doctor, MLA, IAS officer
Solution: D
The professor lives below the IAS officer. The engineer lives below the MLA, who lives above the professor's friend. The doctor lives in the middle. Therefore, the order is:
Professor, Engineer, Doctor, MLA, IAS officer.
10.Only six roads A, B, C, P, Q and R connect a military camp to the rest of the country. Only one out of A, P, and R are open at any one time. If B is closed, so is Q. Only one of A & B is open during storms. P is closed during floods. In the context, which one of the following statements is correct?
A.Under normal conditions only three roads are open.
B.During storms at least one road is open.
C.During floods only three roads are open
D.During calamities all roads are closed
Solution: B
Under normal conditions, only one of A, P, and R is open, so at least two roads are open.
During storms, only one of A and B is open, so at least one road is open.
During floods, P is closed, so at least five roads are open.
During calamities, there is no information to suggest that all roads are closed.
Therefore, the only statement that is always correct is B. During storms at least one road is open.
11.Examine the following statements:
1.None but students are the members of the club.
2.Some members of the club are married.
3.All married persons are invited for dance.
Which one of the conclusions can be drawn from the above statements?
A.All students are invited for dance
B.All married students are invited for dance
C.All members of the club are married person
D.None of the above conclusions can be drawn
Solution: D
The first statement says that only students are members of the club. This means that all members of the club are students, but it does not mean that all students are members of the club.
The second statement says that some members of the club are married. This means that some students are married, but it does not mean that all students are married.
The third statement says that all married persons are invited for dance. This means that all married students are invited for dance, but it does not mean that all students are invited for dance.
Based on these statements, we cannot conclude that all students are invited for dance, that all married students are invited for dance, or that all members of the club are married persons.
12.Four political parties W, X, Y and Z decided to set up a joint candidate for the coming parliamentary elections. The formula agreed by them was the acceptance of a candidate of the most of the parties.
Four aspiring candidates A, B, C and D approached the parties for their ticket.
A was acceptable to W but not Z
B was acceptable to Y but not X
C was acceptable to W and Y
D was acceptable to W and X
When candidate B was preferred by W and Z, candidate C was preferred by X and Z and candidate A was acceptable to X but not Y: Who got the ticket?
A.A
B.B
C.C
D.D
Solution: C
Candidate B is acceptable to only two parties, W and Z. Candidate C is acceptable to three parties, W, X, and Z. Therefore, candidate C is the most acceptable candidate to the most parties.
13.Consider the following statements:
1.All X-brand cars parked here are white.
2.Some of them have radial tyres
3.All X-brand cars manufactured after 1986 have radial tyres are parked here.
4.All cars are not X-brand.
Which one of the following conclusions can be drawn from the above statements?
A.Only white cars are parked here.
B.Some white X-brand cars with radial tyres are parked here.
C.Cars other than X-brand cannot have radial tyres.
D.Most of the X-brand cars were manufactured before 1986.
Solution: B
The first statement says that all X-brand cars parked here are white. The second statement says that some of the cars parked here have radial tyres. The third statement says that all X-brand cars manufactured after 1986 have radial tyres. The fourth statement says that not all cars are X-brand.
Based on these statements, we can conclude that some of the cars parked here are white X-brand cars with radial tyres. We cannot conclude that only white cars are parked here, that cars other than X-brand cannot have radial tires, or that most of the X-brand cars were manufactured before 1986.
14.Consider the following statements:
The Third World War, if it ever starts, will end very quickly with the possible end of civilization. It is only the misuse of nuclear power which will trigger it.
Based on the above statement, which one of the following inferences is correct?
A.Nuclear power will be used in the Third World War.
B.There will be no civilization left after the third world war.
C.The growth of nuclear power will destroy civilization in the long run.
D.The third world war will not take place.
Solution: A
The correct answer is A. Nuclear power will be used in the Third World War.
The statement says that the Third World War will end very quickly with the possible end of civilization. It is only the misuse of nuclear power which will trigger it. This means that nuclear power will be used in the Third World War, and that it could lead to the end of civilization.
We cannot conclude that there will be no civilization left after the third world war, that the growth of nuclear power will destroy civilization in the long run, or that the third world war will not take place.
15. Figures given below are changing with certain rules as we observe them from left to right:
According to this rule, which of the following would be the next figure if the changes were made in the same rule?
Solution: D
The triangle is moving along the corners anti-clockwise and turning upside down successively. So in the answer figure it has to be at the left top and vertical up.
So option D is the correct answer.
16.Consider the following information regarding the performance of class of 1000 students in four different tests:
If a student scores 74 marks in each of the four tests, in which one of the following tests is her performance the best comparatively?
A.Test I
B.Test II
C.Test III
D.Test IV
Solution: B
Her performance would be best in test II as compared to the other test.
Because test II's highest marks are 75 and she scored 74 in test II.
17.Six squares are coloured, front and back, red(R), blue(B), yellow (Y), green (G), white (W), orange (O) and are hinged together as shown in the figure given below. If they were folded to form a cube what would be the face opposite to white face?
A.R
B.G
C.B
D.O
Solution: C
1 : When G is arranged to the base, B is the back face and W is the front face. Thus, B is opposite to W.
2 : Let Y be the top and fold G, O and W down. Then, B will fold to become the back face and be opposite.
18.In the below figure, circle P represents hard working people, circle Q represents intelligent people, Circle R represents truthful people and circle S represents honest people. Which region represents the people who are intelligent, honest and truthful but not hardworking?
A.6
B.7
C.8
D.11
Solution: A
The region 6 represents the people who are intelligent, honest, truthful but not hardworking.
19.Three views of a cube following a particular motion are given below:
What is the opposite letter to A?
A.H
B.P
C.B
D.M
Solution: A
In the first two figures,
A, B, H and M are adjacent to K. So, the letter opposite to A has to be either H or M.
Now, there are two conditions. One, if M is opposite to A, then H will be opposite to B.
But from the third figure, it's not possible.
So,H has to be opposite to A.
20.Which one of the figures shown below occupies the blank space(?) in the matrix given below?
A.
B.
C.
D. 
Solution: D
The pattern is that In the first and third set, the black portion of the middle image is diagonally opposite to that of the first image.
So, the second image in the second set must be diagonally opposite to the first one.
Therefore D is correct.
21.Consider the following statements:
1.All artists are whimsical.
2.Some artists are drug addicts.
3.Frustrated people are prone to become drug addicts.
From the above three statements it may be concluded that:
A.Artists are frustrated
B.Some drug addicts are whimsical
C.All frustrated people are drug addicts.
D.Whimsical people are generally frustrated
Solution: B
Statement 1 says that all artists are whimsical. This means that the set of all artists is a subset of the set of all whimsical people.
Statement 2 says that some artists are drug addicts. This means that there is some overlap between the set of all artists and the set of all drug addicts.
Statement 3 says that frustrated people are prone to become drug addicts. This means that there is some overlap between the set of all frustrated people and the set of all drug addicts.
Based on these statements, we can conclude that there is some overlap between the set of all drug addicts and the set of all whimsical people. This means that some drug addicts are whimsical.
We cannot conclude that all artists are frustrated, that all frustrated people are drug addicts, or that whimsical people are generally frustrated.
22.Examine the following statements:
1.Either A & B are of same age or A is older than B
2.Either C & D are of same age or D is older than C
3.B is older than C
Which of the following conclusions can be drawn from the above statements?
A.A is older than B
B.B and D are of the same age
C.D is older than C
D.A is older than C
Solution: D
Statement 1 says that either A and B are of the same age or A is older than B. Statement 2 says that either C and D are of the same age or D is older than C. Statement 3 says that B is older than C.
Based on these statements, we can conclude that A is older than C. We can also conclude that B is older than C. We cannot conclude that A is older than B, that B and D are of the same age, or that D is older than C.
[A > B > C > D]
A is older than B, who is older than C, who is older than D. Therefore, A is older than C.
23.Examine the following statements:
1.Only those who have a pair of binoculars can become a member of the birdwatcher's club.
2.Some members of the birdwatcher's club have cameras.
3.Those members who have cameras can take part in photo-contests.
Which of the following conclusions can be drawn from the above statements?
A.All those who have a pair of binoculars are members of the birdwatcher's club.
B.All members of the birdwatcher's club have a pair of binoculars.
C.All those who take part in photo-contests are members of the birdwatcher's club.
D.No conclusion can be drawn.
Solution:B
Statement 1 says that only those who have a pair of binoculars can become a member of the birdwatcher's club. This means that all members of the birdwatcher's club have a pair of binoculars.
Statement 2 says that some members of the birdwatcher's club have cameras. This means that some members of the birdwatcher's club have cameras, but not all members of the birdwatcher's club have cameras.
Statement 3 says that those members who have cameras can take part in photo-contests. This means that some members of the birdwatcher's club can take part in photo-contests, but not all members of the birdwatcher's club can take part in photo-contests.
Based on these statements, we can conclude that all members of the birdwatcher's club have a pair of binoculars. We cannot conclude that all those who have a pair of binoculars are members of the birdwatcher's club, that all those who take part in photo-contests are members of the birdwatcher's club, or that no conclusion can be drawn.
24.During the summer vacation Ankit went to a summer camp where he took part in hiking, swimming and boating. This summer, he is looking forward to a music camp where he hopes to sing, dance and learn to play the guitar.
Based on the above information four conclusions as given below, have been made. Which one of these logically follows from the information given above?
A.Ankit's parents want him to play guitar.
B.Ankit prefers music to outdoor activities.
C.Ankit goes to some type of camp every summer.
D.Ankit likes to sing and dance
Solution: C
The correct answer is C. Ankit goes to some type of camp every summer.
The passage states that Ankit went to a summer camp last summer and is looking forward to a music camp this summer. This means that Ankit goes to some type of camp every summer.
We cannot conclude that Ankit's parents want him to play guitar, that Ankit prefers music to outdoor activities, or that Ankit likes to sing and dance. The passage does not provide any information about Ankit's parents' wishes, Ankit's preferences, or Ankit's singing and dancing abilities.
25.Three persons A, B & C wear shirts of Black, Blue and Orange colours (not necessarily in the order) and pants of green, yellow and orange (not necessarily in that order). No person wore shirt and pant of the same colour. Further, it is given that,
A did not wear shirt of black colour.
B did not wear shirt of blue colour.
C did not wear shirt of orange colour.
A did not wear the pants of green colour
B wore pants of orange colour.
What were the colours of the pants and shirts worn by C respectively?
A.Orange and black
B.Green and blue
C.Yellow and blue
D.Yellow and black
Solution: B
We know that A did not wear a black shirt, B did not wear a blue shirt, and C did not wear an orange shirt. We also know that A did not wear green pants, and B wore orange pants. This means that C wore the green pants.
Since C wore the green pants, he could not have worn the green shirt. This means that he wore the blue shirt.
Therefore, C wore the green pants and the blue shirt.
26.Ten new TV shows started in January- 5 sitcoms, 3 dramas and 2 news magazines. By April, only seven of the new shows were still on, five of them being sitcoms.
Based on the above information, conclusions, as given below, have been made.
Which of these logically follows from the information given above?
A.Only one news magazine show is still going on.
B.Only one of the drama show is still going on.
C.At least one discontinued show was a drama.
D.Viewers prefer sitcoms over drama.
Solution: C
The correct answer is C. At least one discontinued show was a drama.
We know that there were 10 new TV shows in January, 5 sitcoms, 3 dramas, and 2 news magazines. By April, only 7 of the new shows were still on, 5 of them being sitcoms. This means that 3 shows were discontinued.
Since there were only 2 news magazines, and 5 sitcoms were still on, we know that at least one of the discontinued shows was a drama. We cannot conclude that only one news magazine show is still on, that only one of the drama shows is still on, or that viewers prefer sitcoms over drama.
27.Mr. Kumar drives to work at an average speed of 48 km/hr. The time taken to cover the first 60% of the distance is 10 minutes more than the time taken to cover the remaining distance. How far is his office?
A.30km
B.40km
C.45km
D.48km
Solution: B
The answer is B. 40km.
Let x be the total distance to the office .
Time taken to cover 60% of x = (60/100)×x/48
Time taken to cover 40% of x = (40/100)×x/48
Given that, time taken to cover 60% of x is 10 minutes more than the time taken to cover 40% of x.
(60/100)×x/48 - (40/100)×x/48 = 10/60
=> 60x/4800 - 40x/4800 = 10/60
=> 20x/4800 = 10/60
=> x/240 = 1/6
=> x = 240/6
=> x = 40
=> x = 40km.
28.Gita is prettier than Sita but not as pretty as Rita. Then,
A.Sita is not as pretty as Gita
B.Sita is prettier than Rita
C.Rita is not as pretty as Gita
D.Gita is prettier than Rita
Solution: A
The statement "Gita is prettier than Sita but not as pretty as Rita" can be interpreted as follows:
- Gita is prettier than Sita.
- Rita is prettier than Gita.
This means that Rita is the prettiest, followed by Gita, and then Sita. Therefore, Sita is not as pretty as Gita.
29.Given that,
A is the brother of B
C is the father of A.
D is the brother of E.
E is the daughter of B
Then, the uncle of D is?
A.A
B.B
C.C
D.E
Solution: A
Given that A is the brother of B, C is the father of A, D is the brother of E, and E is the daughter of B. This means that A and B are siblings, C is their father, D and E are siblings, and B is their mother. Therefore, A is the uncle of D.
30.Examine the following statements:
1.Rama scored more than Rani
2.Rani scored less than Ratna
3.Ratna scored more than Rama
4.Padma scored more than Rama but less than Ratna.
Who scored the highest?
A.Rama
B.Padma
C.Rani
D.Ratna
Solution: D
