UPSC Prelims 2020
Get UPSC Prelims Previous Year Question (PYQ) Papers with detailed explanations, mindmaps, organized year-wise and subject-wise for CSAT.
- ReasoningView Answer for: Two Statements are given followed by two Conclusions:Statements: All cats are dogs. All cats are black.Conclusion-I: All dogs are black. Conclusion-II: Some dogs are not black.Which of the above Conclusions logically follows/follow from the two given Statements, disregarding commonly known facts?
Two Statements are given followed by two Conclusions:
Statements: All cats are dogs. All cats are black.
Conclusion-I: All dogs are black. Conclusion-II: Some dogs are not black.
Which of the above Conclusions logically follows/follow from the two given Statements, disregarding commonly known facts?
- ReasoningView Answer for: In the sum $ \otimes + 1\otimes + 5\otimes + \otimes\otimes + \otimes1 = 1\otimes\otimes $ for which digit does the symbol $\otimes$ stand?
In the sum for which digit does the symbol stand?
- ReasoningView Answer for: What is the remainder when $51 \times 27 \times 35 \times 62 \times 75$ is divided by 100?
What is the remainder when is divided by 100?
- ReasoningView Answer for: How many different sums can be formed with the denomination Rs. 50, Rs. 100, Rs. 200, Rs. 500, and Rs. 2,000 taking at least three denominations at a time?
How many different sums can be formed with the denomination Rs. 50, Rs. 100, Rs. 200, Rs. 500, and Rs. 2,000 taking at least three denominations at a time?
- ReasoningView Answer for: Consider the following arrangement that has some missing letters: ababbbcbdcdcdeddThe missing letters which complete the arrangement are
Consider the following arrangement that has some missing letters: abab_b_bcb_dcdcded_d
The missing letters which complete the arrangement are
- ReasoningView Answer for: The average age of a teacher and three students in 20 years. If all the three students are of same age and the difference between the age of the teachers and each student is 20 years, then what is the age of the teacher?
The average age of a teacher and three students in 20 years. If all the three students are of same age and the difference between the age of the teachers and each student is 20 years, then what is the age of the teacher?
- ReasoningView Answer for: What is the missing term @ in the following? ACPQ : BESU : MNGI : $NOLF$
What is the missing term @ in the following? ACPQ : BESU : MNGI :
- ReasoningView Answer for: How many pairs of natural numbers are there such that the difference of whose squares is 63?
How many pairs of natural numbers are there such that the difference of whose squares is 63?
- ReasoningView Answer for: How many different 5-letter words (with or without meaning) can be constructed using all the letters of the word ‘DELHI’ so that each word has to start with D and end with I?
How many different 5-letter words (with or without meaning) can be constructed using all the letters of the word ‘DELHI’ so that each word has to start with D and end with I?
- ReasoningView Answer for: A is 16th from the left end in a row of boys and V is 18th from the right end. G is 11th from A towards the right and 3rd from V towards the right end. How many boys are there in the row?
A is 16th from the left end in a row of boys and V is 18th from the right end. G is 11th from A towards the right and 3rd from V towards the right end. How many boys are there in the row?
- ReasoningView Answer for: Two Statements S1 and S2 are given below followed by a Question:S1 : $n$ is a prime number. S2 : $n$ leaves a remainder of 1 when divided by 4.Question: If $n$ is a unique natural number between 10 and 20, then what is $n$?Which one of the following is correct in respect of above Statements and the Question?
Two Statements S1 and S2 are given below followed by a Question:
S1 : is a prime number. S2 : leaves a remainder of 1 when divided by 4.
Question: If is a unique natural number between 10 and 20, then what is ?
Which one of the following is correct in respect of above Statements and the Question?
- ReasoningView Answer for: In adult population of a city, $40\%$ men and $30\%$ women are married. What $ \%$ of the total adult population is married, if no man marries more than one woman and no woman marries more than one man; and there are no widows and widowers?
In adult population of a city, men and women are married. What of the total adult population is married, if no man marries more than one woman and no woman marries more than one man; and there are no widows and widowers?
- ReasoningView Answer for: Consider the following data: Year | Birth Rate | Death Rate -------------|------------|------------ 1911-1921 | $48.1$ | $35.5$ 1921-1931 | $46.4$ | $36.3$ 1931-1941 | $45.2$ | $31.2$ 1941-1951 | $39.9$ | $27.4$ 1951-1961 | $41.7$ | $22.8$ 1961-1971 | $41.1$ | $18.9$ 1971-1981 | $37.1$ | $14.8$ For which period was the natural growth rate maximum?
Consider the following data:
Year Birth Rate Death Rate 1911-1921 1921-1931 1931-1941 1941-1951 1951-1961 1961-1971 1971-1981 For which period was the natural growth rate maximum?
- ReasoningView Answer for: Three Statements S1, S2 and S3 are given below followed by a Question:S1 : C is younger than D, but older than A and B. S2 : D is the oldest. S3 : A is the older than B.Questions: Who among A, B, C and D is the youngest?Which one of the following is correct in respect of the above Statements and the Question?
Three Statements S1, S2 and S3 are given below followed by a Question:
S1 : C is younger than D, but older than A and B. S2 : D is the oldest. S3 : A is the older than B.
Questions: Who among A, B, C and D is the youngest?
Which one of the following is correct in respect of the above Statements and the Question?
- ReasoningView Answer for: A man walks down the backside of his house straight $25$ metres, then turns to the right and walks $50$ metres again; then he turns towards left and again walks $25$ metres. If his house faces to the East, what is his direction from the starting point?
A man walks down the backside of his house straight metres, then turns to the right and walks metres again; then he turns towards left and again walks metres. If his house faces to the East, what is his direction from the starting point?
- ReasoningView Answer for: Let x, y be the volumes; m, n be the masses of two metallic cubes P and Q respectively. Each side of Q is two times that of P and mass of Q is two times that of P. Let $u = \frac{m}{x}$ and $v = \frac{n}{y}$. Which one of the following is correct?
Let x, y be the volumes; m, n be the masses of two metallic cubes P and Q respectively. Each side of Q is two times that of P and mass of Q is two times that of P. Let and . Which one of the following is correct?
- ReasoningView Answer for: A family of two generations consisting of six members P, Q, R, S, T and U has three males and three females. There are two married couples and two unmarried siblings. U is P’s daughter and Q is R’s mother-in-law. T is an unmarried male and S is a male. Which one of the following is correct?
A family of two generations consisting of six members P, Q, R, S, T and U has three males and three females. There are two married couples and two unmarried siblings. U is P’s daughter and Q is R’s mother-in-law. T is an unmarried male and S is a male. Which one of the following is correct?
- ReasoningView Answer for: Two statements S1 and S2 are given below followed by a Question:S1 : There are not more than two figures on any page of a 51-page book. S2 : There is at least one figure on every page.Question: Are there more than 100 figures in that book?Which one of the following is correct in respect of the above Statements and the Question?
Two statements S1 and S2 are given below followed by a Question:
S1 : There are not more than two figures on any page of a 51-page book. S2 : There is at least one figure on every page.
Question: Are there more than 100 figures in that book?
Which one of the following is correct in respect of the above Statements and the Question?
- ReasoningView Answer for: Consider the following sequence of numbers: 5 1 4 7 3 9 8 5 7 2 6 3 1 5 8 6 3 8 5 2 2 4 3 4 9 6 How many odd numbers are followed by the odd number in the above sequence?
Consider the following sequence of numbers: 5 1 4 7 3 9 8 5 7 2 6 3 1 5 8 6 3 8 5 2 2 4 3 4 9 6 How many odd numbers are followed by the odd number in the above sequence?
- ReasoningView Answer for: A simple mathematical operation in each number of sequence 14, 18, 20, 24, 30, 32, … results in a sequence with respect to prime numbers. Which one of the following is the next number in the sequence?
A simple mathematical operation in each number of sequence 14, 18, 20, 24, 30, 32, … results in a sequence with respect to prime numbers. Which one of the following is the next number in the sequence?
- ReasoningView Answer for: The letters from A to Z are numbered from 1 to 26 respectively. If GHI = $1578$ and DEF = $912$, then what is ABC equal to ?
The letters from A to Z are numbered from 1 to 26 respectively. If GHI = and DEF = , then what is ABC equal to ?
- ReasoningView Answer for: In a class, there are three groups A, B and C. If one student from group A and two students from group B are shifted to group C, then what happens to the average weight of the students of the class?
In a class, there are three groups A, B and C. If one student from group A and two students from group B are shifted to group C, then what happens to the average weight of the students of the class?
- ReasoningView Answer for: In the particular year 12th January is a Sunday, then which one of the following is correct?
In the particular year 12th January is a Sunday, then which one of the following is correct?
- ReasoningView Answer for: If you have two straight sticks of length 7.5 feet and 3.25 feet, what is the minimum length can your measure?
If you have two straight sticks of length 7.5 feet and 3.25 feet, what is the minimum length can your measure?
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