UPSC Prelims 2015
Get UPSC Prelims Previous Year Question (PYQ) Papers with detailed explanations, mindmaps, organized year-wise and subject-wise for CSAT.
- ReasoningView Answer for: A society has fighters and cowards. Cowards are enemies with each other and with fighters, while fighters are indifferent to each other. If A and B are enemies, C and D are friends, E and F are indifferent, A and E are not enemies, and B and F are enemies, which statement is correct?
A society has fighters and cowards. Cowards are enemies with each other and with fighters, while fighters are indifferent to each other. If A and B are enemies, C and D are friends, E and F are indifferent, A and E are not enemies, and B and F are enemies, which statement is correct?
- ReasoningView Answer for: In a group of persons traveling in a bus, 6 persons can speak Tamil, 15 can speak Hindi, and 6 can speak Gujarati. In that group, none can speak any other language. If 2 persons in the group can speak two languages only, and one person can speak all three languages, then how many persons are there in the group?
In a group of persons traveling in a bus, 6 persons can speak Tamil, 15 can speak Hindi, and 6 can speak Gujarati. In that group, none can speak any other language. If 2 persons in the group can speak two languages only, and one person can speak all three languages, then how many persons are there in the group?
- ReasoningView Answer for: Four persons A, B, C, and D, consisting of two married couples, are in a group. Both the women are shorter than their respective husbands. A is the tallest among the four. C is taller than B. D is B’s brother.In this context, which one of the following statements is not correct?
Four persons A, B, C, and D, consisting of two married couples, are in a group. Both the women are shorter than their respective husbands. A is the tallest among the four. C is taller than B. D is B’s brother.
In this context, which one of the following statements is not correct?
- ReasoningView Answer for: Consider the following statements followed by two conclusions:Statements: Some men are great. Some men are wise.Conclusions: I. Men are either great or wise. II. Some men are neither great nor wise.Which one of the following is correct?
Consider the following statements followed by two conclusions:
Statements:
- Some men are great.
- Some men are wise.
Conclusions: I. Men are either great or wise. II. Some men are neither great nor wise.
Which one of the following is correct?
- ReasoningView Answer for: There are 5 tasks and 5 persons. Task-1 cannot be assigned to person-1 or person-2. Task-2 must be assigned to person-3 or person-4. Each person is to be assigned one task. In how many ways can the assignment be done?
There are 5 tasks and 5 persons. Task-1 cannot be assigned to person-1 or person-2. Task-2 must be assigned to person-3 or person-4. Each person is to be assigned one task. In how many ways can the assignment be done?
- ReasoningView Answer for: The number of persons who read magazine X only is thrice the number of persons who read magazine Y. The number of persons who read magazine Y only is thrice the number of persons who read magazine X. Then, which of the following conclusions can be drawn? The number of persons who read both the magazines is twice the number of persons who read only magazine X. The total number of persons who read either one magazine or both the magazines is twice the number of persons who read both the magazines.Select the correct answer using the code given below:
The number of persons who read magazine X only is thrice the number of persons who read magazine Y. The number of persons who read magazine Y only is thrice the number of persons who read magazine X. Then, which of the following conclusions can be drawn?
- The number of persons who read both the magazines is twice the number of persons who read only magazine X.
- The total number of persons who read either one magazine or both the magazines is twice the number of persons who read both the magazines.
Select the correct answer using the code given below:
- ReasoningView Answer for: Lines X, Y, Z, U, V, and W lie in a plane. Line X is perpendicular to Y and parallel to Z. Line U is perpendicular to both V and W. Line X is also perpendicular to V. Which statement is correct?
Lines X, Y, Z, U, V, and W lie in a plane. Line X is perpendicular to Y and parallel to Z. Line U is perpendicular to both V and W. Line X is also perpendicular to V. Which statement is correct?
- ReasoningView Answer for: How many logically possible orders of the six cousins (A, B, C, D, E, and F) can be formed in increasing order of age?
How many logically possible orders of the six cousins (A, B, C, D, E, and F) can be formed in increasing order of age?
- ReasoningView Answer for: If ABC × DEED = ABCABC; where A, B, C, D and E are different digits, what are the values of D and E?
If ABC × DEED = ABCABC; where A, B, C, D and E are different digits, what are the values of D and E?
- ReasoningView Answer for: In a box of marbles, there are 3 fewer white marbles than red ones and 5 more white marbles than green ones. If there are 10 white marbles, how many marbles are in the box?
In a box of marbles, there are 3 fewer white marbles than red ones and 5 more white marbles than green ones. If there are 10 white marbles, how many marbles are in the box?
- ReasoningView Answer for: Each of the six different faces of a cube has been coated with a different color, i.e., V, I, B, G, Y, and O. Following information is given: Colors Y, O, and B are on adjacent faces. Colors I, G, and Y are on adjacent faces. Colors B, G, and Y are on adjacent faces.Which is the color of the face opposite to the face colored with O?
Each of the six different faces of a cube has been coated with a different color, i.e., V, I, B, G, Y, and O. Following information is given:
- Colors Y, O, and B are on adjacent faces.
- Colors I, G, and Y are on adjacent faces.
- Colors B, G, and Y are on adjacent faces.
Which is the color of the face opposite to the face colored with O?
- ReasoningView Answer for: What is the missing number ‘X’ of the series: 7, $X$, 21, 31, 43?
What is the missing number ‘X’ of the series: 7, , 21, 31, 43?
- ReasoningView Answer for: Consider the following statements: A man had a wife, two sons, and two daughters in his family. The daughters were invited to a feast, and the male members of the family went out to take part in a picnic. The man’s father did not return from his work.Which of the following statements is true?
Consider the following statements:
- A man had a wife, two sons, and two daughters in his family.
- The daughters were invited to a feast, and the male members of the family went out to take part in a picnic.
- The man’s father did not return from his work.
Which of the following statements is true?
- ReasoningView Answer for: A group consists of Anil, David, Shabnam, and Rekha. Anil speaks Tamil, Shabnam speaks Marathi, and both Rekha and David can drive. Only one man and one woman can drive. Which of the following statements is true?
A group consists of Anil, David, Shabnam, and Rekha. Anil speaks Tamil, Shabnam speaks Marathi, and both Rekha and David can drive. Only one man and one woman can drive. Which of the following statements is true?
- ReasoningView Answer for: Usha runs faster than Kamala, Priti runs slower than Swati, and Swati runs slower than Kamala. Who is the slowest runner?
Usha runs faster than Kamala, Priti runs slower than Swati, and Swati runs slower than Kamala. Who is the slowest runner?
- ReasoningView Answer for: In a competitive exam, 60% of candidates are men, and 40% are women. 70% of men and 75% of women clear the qualifying test. In the final test, 80% of men and 70% of women succeed. Which statement is correct?
In a competitive exam, 60% of candidates are men, and 40% are women. 70% of men and 75% of women clear the qualifying test. In the final test, 80% of men and 70% of women succeed. Which statement is correct?
- ReasoningView Answer for: A student has to opt for 2 subjects out of 5 subjects for a course, namely, Commerce, Economics, Statistics, Mathematics I, and Mathematics II. Mathematics II can be offered only if Mathematics I is also opted. The number of different combinations of two subjects that can be opted is:
A student has to opt for 2 subjects out of 5 subjects for a course, namely, Commerce, Economics, Statistics, Mathematics I, and Mathematics II. Mathematics II can be offered only if Mathematics I is also opted. The number of different combinations of two subjects that can be opted is:
- ReasoningView Answer for: Examine the following statements: Lady’s finger is tastier than cabbage. Cauliflower is tastier than lady’s finger. Cabbage is not tastier than peas.The conclusion that can be drawn from these statements is that:
Examine the following statements:
- Lady’s finger is tastier than cabbage.
- Cauliflower is tastier than lady’s finger.
- Cabbage is not tastier than peas.
The conclusion that can be drawn from these statements is that:
- ReasoningView Answer for: Cousins A, B, C, D, E, and F are of different ages. E is the oldest at 22, and the youngest is 17. A is older than B, and C is older than D. F’s age is between B and D, and A is one year older than C. Which of the following is possible?
Cousins A, B, C, D, E, and F are of different ages. E is the oldest at 22, and the youngest is 17. A is older than B, and C is older than D. F’s age is between B and D, and A is one year older than C. Which of the following is possible?
- ReasoningView Answer for: If A runs less fast than B, and B runs as fast but not faster than C, then as compared to A, C runs
If A runs less fast than B, and B runs as fast but not faster than C, then as compared to A, C runs
- ReasoningView Answer for: Four cardboard pieces of specific shapes are shown in the following figure:14Which one of the following figures given can be formed by joining these pieces together?
Four cardboard pieces of specific shapes are shown in the following figure:
Which one of the following figures given can be formed by joining these pieces together?
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