UPSC Prelims 2021 Question Paper & Analysis
Get UPSC Prelims Previous Year Question (PYQ) Papers with detailed explanations, mindmaps, organized year-wise and subject-wise for CSAT.
PYQs with Detailed Answers
- View Answer for: What is the value of ‘X’ in the sequence 2, 7, 22, 67, 202, X, 1822?
What is the value of ‘X’ in the sequence 2, 7, 22, 67, 202, X, 1822?
- View Answer for: You are given two identical sequences in two rows: Sequence-I | 8 | 4 | 6 | 15 | 52.5 | 236.5 - | - | - | - | - | - | - Sequence-II | 5 | A | B | C | D | E What is the entry in the place of C for the Sequence-II?
You are given two identical sequences in two rows:
Sequence-I 8 4 6 15 52.5 236.5 Sequence-II 5 A B C D E What is the entry in the place of C for the Sequence-II?
- View Answer for: In a group of 120 persons, 80 are Indians and rest are foreigners. Further, 70 persons in the group can speak English. The number of Indians who can speak English is
In a group of 120 persons, 80 are Indians and rest are foreigners. Further, 70 persons in the group can speak English. The number of Indians who can speak English is
- View Answer for: A woman runs 12 km towards her North, then 6 km towards her South and then 8 km towards her East. In which direction is she from her starting point?
A woman runs 12 km towards her North, then 6 km towards her South and then 8 km towards her East. In which direction is she from her starting point?
- View Answer for: In the English alphabet, the first 4 letters are written in opposite order, and the next 4 letters are written in opposite order and so on; and at the end Y and Z are interchanged. Which will be the fourth letter to the right of the 13th letter?
In the English alphabet, the first 4 letters are written in opposite order, and the next 4 letters are written in opposite order and so on; and at the end Y and Z are interchanged. Which will be the fourth letter to the right of the 13th letter?
- View Answer for: Images of consonants of the English alphabet (Capitals) are observed in a mirror. What is the number of images of these which do not look like their original shapes?
Images of consonants of the English alphabet (Capitals) are observed in a mirror. What is the number of images of these which do not look like their original shapes?
- View Answer for: Joseph visits the club on every 5th day, Harsh visits on every 24th day, while Sumit visits on every 9th day. If all three of them met at the club on a Sunday, then on which day will all three of them meet again?
Joseph visits the club on every 5th day, Harsh visits on every 24th day, while Sumit visits on every 9th day. If all three of them met at the club on a Sunday, then on which day will all three of them meet again?
- View Answer for: Consider two Statements and a Question :Statement-1: The last day of the month is a Wednesday. Statement-2 : The third Saturday of the month was the seventeenth day.Question: What day is the fourteenth of the given month?Which one of the following is correct in respect of the Statements and the Question?
Consider two Statements and a Question :
Statement-1: The last day of the month is a Wednesday. Statement-2 : The third Saturday of the month was the seventeenth day.
Question: What day is the fourteenth of the given month?
Which one of the following is correct in respect of the Statements and the Question?
- View Answer for: A bank employee drives 10 km towards South from her house and turns to her left and drives another 20 km. She again turns left and drives 40 km, then she turns to her right and drives for another 5 km. She again turns to her right and drives another 30 km to reach her bank where she works. What is the shortest distance between her bank and her house?
A bank employee drives 10 km towards South from her house and turns to her left and drives another 20 km. She again turns left and drives 40 km, then she turns to her right and drives for another 5 km. She again turns to her right and drives another 30 km to reach her bank where she works. What is the shortest distance between her bank and her house?
- View Answer for: Consider two Statements and a Question:Statement-1: Priya is 4 ranks below Seema and is 31st from the bottom. Statement-2: Ena is 2 ranks above Seema and is 37th from the bottom. Question: What is Seema's rank from the top in the class of 40 students?Which one of the following is correct in respect of the Statements and the Question?
Consider two Statements and a Question:
Statement-1: Priya is 4 ranks below Seema and is 31st from the bottom. Statement-2: Ena is 2 ranks above Seema and is 37th from the bottom. Question: What is Seema's rank from the top in the class of 40 students?
Which one of the following is correct in respect of the Statements and the Question?
- View Answer for: A Statement followed by Conclusion-I and Conclusion-II is given below. You have to take the Statement to be true even if it seems to be at variance from the commonly known facts. Read all Conclusions and then decide which of the given Conclusion(s) logically follows/follow from the Statement, disregarding the commonly known facts.Statement: Some radios are mobiles. All mobiles are computers. Some computers are watches.Conclusion-I: Certainly some radios are watches. Conclusion-II: Certainly some mobiles are watches.Which one of the following is correct?
A Statement followed by Conclusion-I and Conclusion-II is given below. You have to take the Statement to be true even if it seems to be at variance from the commonly known facts. Read all Conclusions and then decide which of the given Conclusion(s) logically follows/follow from the Statement, disregarding the commonly known facts.
Statement: Some radios are mobiles. All mobiles are computers. Some computers are watches.
Conclusion-I: Certainly some radios are watches. Conclusion-II: Certainly some mobiles are watches.
Which one of the following is correct?
- View Answer for: A Statement followed by Conclusion-I and Conclusion-II is given below. You have to take the Statement to be true even if it seems to be at variance from the commonly known facts. Read all Conclusions and then decide which of the given Conclusion(s) logically follows/follow from the Statement, disregarding the commonly known facts.Statement: Some cats are almirahs. Some almirahs are chairs. All chairs are tables. Conclusion-I: Certainly some almirahs are tables. Conclusion-II: Some cats may not be chairs.Which one of the following is correct?
A Statement followed by Conclusion-I and Conclusion-II is given below. You have to take the Statement to be true even if it seems to be at variance from the commonly known facts. Read all Conclusions and then decide which of the given Conclusion(s) logically follows/follow from the Statement, disregarding the commonly known facts.
Statement: Some cats are almirahs. Some almirahs are chairs. All chairs are tables. Conclusion-I: Certainly some almirahs are tables. Conclusion-II: Some cats may not be chairs.
Which one of the following is correct?
- View Answer for: Replace the incorrect term by the correct term in the given sequence: 3, 2, 7, 4, 13, 10, 21, 18, 31, 28, 43, 40 where odd terms and even terms follow the same pattern.
Replace the incorrect term by the correct term in the given sequence: 3, 2, 7, 4, 13, 10, 21, 18, 31, 28, 43, 40 where odd terms and even terms follow the same pattern.
- View Answer for: Consider two Statements and a Question:Statement-1: Each of A and D is heavier than each of B, E and F, but none of them is the heaviest. Statement-2: A is heavier than D, but is lighter than C. Question: Who is the heaviest among A, B, C, D and E?Which one of the following is correct in respect of the Statements and the Question?
Consider two Statements and a Question:
Statement-1: Each of A and D is heavier than each of B, E and F, but none of them is the heaviest. Statement-2: A is heavier than D, but is lighter than C. Question: Who is the heaviest among A, B, C, D and E?
Which one of the following is correct in respect of the Statements and the Question?
- View Answer for: Seven books P, Q, R, S, T, U, and V are placed side by side. R, Q, and T have blue covers and other books have red covers. Only S and U are new books and the rest are old. P, R and S are law reports; the rest are Gazetteers. Books of old Gazetteers with blue covers are:
Seven books P, Q, R, S, T, U, and V are placed side by side. R, Q, and T have blue covers and other books have red covers. Only S and U are new books and the rest are old. P, R and S are law reports; the rest are Gazetteers. Books of old Gazetteers with blue covers are:
- View Answer for: In a code language 'MATHEMATICS' is written as 'LBSIDNZUHDR'. How is CHEMISTRY' written in that code language?
In a code language 'MATHEMATICS' is written as 'LBSIDNZUHDR'. How is CHEMISTRY' written in that code language?
- View Answer for: Half of the villagers of a certain village have their own houses. One-fifth of the villagers cultivate paddy. One-third of the villagers are literate. Four-fifth of the villagers are under 25 years of age.Which one of the following statements is certainly correct?
Half of the villagers of a certain village have their own houses. One-fifth of the villagers cultivate paddy. One-third of the villagers are literate. Four-fifth of the villagers are under 25 years of age.
Which one of the following statements is certainly correct?
- View Answer for: At which one of the following times, do the hour hand and the minute hand of the clock make an angle of $180^{\circ}$ with each other?
At which one of the following times, do the hour hand and the minute hand of the clock make an angle of with each other?
- View Answer for: Consider two Statements and four Conclusions given below. You have to take the Statements to be true even if they seem to be at variance from the commonly known facts. Read all Conclusions and then decide which of the given Conclusion(s) logically follows/follow from the Statements, disregarding the commonly known facts.Statement-1: Some greens are blues. Statement-2: Some blues are blacks.Conclusion-1: Some greens are blacks. Conclusion-2: No green is black. Conclusion-3: All greens are blacks. Conclusion-4: All blacks are greens.Which one of the following is correct?
Consider two Statements and four Conclusions given below. You have to take the Statements to be true even if they seem to be at variance from the commonly known facts. Read all Conclusions and then decide which of the given Conclusion(s) logically follows/follow from the Statements, disregarding the commonly known facts.
Statement-1: Some greens are blues. Statement-2: Some blues are blacks.
Conclusion-1: Some greens are blacks. Conclusion-2: No green is black. Conclusion-3: All greens are blacks. Conclusion-4: All blacks are greens.
Which one of the following is correct?
- View Answer for: Which day is 10th October, 2027?
Which day is 10th October, 2027?
- View Answer for: In the series $bababababaab$; fill in the six blanks fusing one of the following given four choices such that the series follows a specific order.
In the series _b_a_ba_b_abab_aab; fill in the six blanks fusing one of the following given four choices such that the series follows a specific order.
- View Answer for: Following is a matrix of certain entries. The entries follow a certain trend row-wise. Choose the missing entry (?) accordingly:Table
Following is a matrix of certain entries. The entries follow a certain trend row-wise. Choose the missing entry (?) accordingly:
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