Considering the alarming importance of CSAT in UPSC CSE Prelims exam and with enormous requests we received recently, InsightsIAS has started Daily CSAT Test to ensure students practice CSAT Questions on a daily basis. Regular Practice would help one overcome the fear of CSAT too.We are naming this initiative as Insta– DART – Daily Aptitude and Reasoning Test. We hope you will be able to use DART to hit bull’s eye in CSAT paper and comfortably score 100+ even in the most difficult question paper that UPSC can give you in CSP-2021. Your peace of mind after every step of this exam is very important for us.
Looking forward to your enthusiastic participation (both in sending us questions and solving them on daily basis on this portal).
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Question 1 of 5
1. Question
There are 3 pipes A, B and C can fill a tank in 6, 12 and 8 hours respectively. Find the time taken to fill the tank if work is done on alternate basis?
Correct
Answer: Option (c)
Explanation:
A = 6
B = 12
C = 8
Total units = 24
A’s units = 4
B’s units = 2
C’s units = 3
Total = 9 units
9 units in 3 Hours
18 units in 6 Hours
4 units by A on 7th hour
Remaining = 24 – 22= 2
Remaining time= 2/2 = 1 hour
Total time = 7+1 = 8 hours Hence, option (c) is the correct answer.
Incorrect
Answer: Option (c)
Explanation:
A = 6
B = 12
C = 8
Total units = 24
A’s units = 4
B’s units = 2
C’s units = 3
Total = 9 units
9 units in 3 Hours
18 units in 6 Hours
4 units by A on 7th hour
Remaining = 24 – 22= 2
Remaining time= 2/2 = 1 hour
Total time = 7+1 = 8 hours Hence, option (c) is the correct answer.
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Question 2 of 5
2. Question
There are two filling pipes A and B can fill the tank in 6 hours and 8 hours respectively. And there is also a waste pipe C which can empty the tank at the rate of 5 litres per minute. All the three pipes are opened together, the tank be filled in 12 hours. Find the capacity of the tank.
Correct
Answer: Option (b)
Explanation:
Pipe A = 6 hours
Pipe B = 8 hours
Pipe A+B–C = 12 hours
LCM = 24 units
Efficiency
Pipe A = 4 units
Pipe B = 3 units
Pipe A+B+C = 2 units
Pipe C = –5units
Time taken by pipe C = 24/−5 = 24/-5
Capacity = (24/5)×60×5 = 1440 litres Hence, option (b) is the correct answer.
Incorrect
Answer: Option (b)
Explanation:
Pipe A = 6 hours
Pipe B = 8 hours
Pipe A+B–C = 12 hours
LCM = 24 units
Efficiency
Pipe A = 4 units
Pipe B = 3 units
Pipe A+B+C = 2 units
Pipe C = –5units
Time taken by pipe C = 24/−5 = 24/-5
Capacity = (24/5)×60×5 = 1440 litres Hence, option (b) is the correct answer.
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Question 3 of 5
3. Question
There are three pipes A, B and C attached to a tank. Pipe A and pipe B can fill it in 6 hours and 8 hours respectively and pipe C can empty it in 3 hours. If pipes are opened in order at 9 a.m., 10 a.m. and 11 p.m. respectively, when will the tank be empty?
Correct
Answer: Option (d)
Explanation:
Pipe A = 6 hours
Pipe B = 8 hours
Pipe C (empty) = 3 hours
LCM = 24 units
Efficiency
Pipe A = 4 units
Pipe B = 3 units
Pipe C (empty) = -8 units At 9 a.m.
Pipe A opened 4×1 = 4 units At 10 a.m.
Pipe B opened 7×1 = 7 units
Total work done till 11 a.m. = 7+4 = 11units
After 11 a.m. all worked together. 7–8 = –1 unit
Time taken by all to empty = 11/1 = 11 hours
Time = 10:00 p.m. Hence, option (d) is the correct answer.
Incorrect
Answer: Option (d)
Explanation:
Pipe A = 6 hours
Pipe B = 8 hours
Pipe C (empty) = 3 hours
LCM = 24 units
Efficiency
Pipe A = 4 units
Pipe B = 3 units
Pipe C (empty) = -8 units At 9 a.m.
Pipe A opened 4×1 = 4 units At 10 a.m.
Pipe B opened 7×1 = 7 units
Total work done till 11 a.m. = 7+4 = 11units
After 11 a.m. all worked together. 7–8 = –1 unit
Time taken by all to empty = 11/1 = 11 hours
Time = 10:00 p.m. Hence, option (d) is the correct answer.
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Question 4 of 5
4. Question
Which organization publishes the Global Innovation Index (GII)?
Correct
Solution: c)
The Global Innovation Index (GII) is published by the World Intellectual Property Organisation (WIPO). The GII provides a detailed analysis of innovation across various economies, evaluating indicators such as ICT services, venture capital, and start-up ecosystems.
Incorrect
Solution: c)
The Global Innovation Index (GII) is published by the World Intellectual Property Organisation (WIPO). The GII provides a detailed analysis of innovation across various economies, evaluating indicators such as ICT services, venture capital, and start-up ecosystems.
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Question 5 of 5
5. Question
A and B take part in 100 m race, where A beats B by 10 m. To favour B, A starts 10 m behind the starting line in a second 100 m race, running at their earlier speeds.
Which one among the following is true in view of the second race?
Correct
Answer: Option (d)
Explanation:
100 m track (given)
‘A’ beat ‘B’ by 10 m
i.e., when B completed 90 m, A completes 100 m.
Next round when ‘A’ run 110 m, how much B run?
1st round when A runs 100 m, B covers 90 m
2nd round when A runs 110 m, B covers x m
100 × x = 110 × 90
i.e., x = 99
When A completed 110 m B completes 99 m.
A win by 1 m. Hence option (d) is correct answer.
Incorrect
Answer: Option (d)
Explanation:
100 m track (given)
‘A’ beat ‘B’ by 10 m
i.e., when B completed 90 m, A completes 100 m.
Next round when ‘A’ run 110 m, how much B run?
1st round when A runs 100 m, B covers 90 m
2nd round when A runs 110 m, B covers x m
100 × x = 110 × 90
i.e., x = 99
When A completed 110 m B completes 99 m.
A win by 1 m. Hence option (d) is correct answer.
