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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 CSP2021. 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).
Wish you all the best ! 🙂
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Question 1 of 5
1. Question
We know remarkably little about the oceans that cover most of the Earth, provide half of our oxygen and help to regulate the climate. Maps of the ocean floor are less detailed than those of Mars or the moon. Marine biologists have discovered deeply weird and genuinely wonderful species: boxer crabs wielding anemones like weapons; the ropelike Praya dubia, up to 50 metres long; immortal jellyfish, which unlike any other known creature can revert from maturity to an earlier stage of development, akin to a butterfly becoming a caterpillar. But on one estimate we have identified less than a tenth of oceandwelling creatures. What we can be certain about is that the extraordinary diversity of life in the oceans is under immense and growing threat.
Which of the following is the most logical and accurate inference that can be drawn from the above passage?
Correct
Ans. C. The passage talks about the fact that we still have not explored much of the life that live in the depth of the ocean and the ocean ecosystem is under huge threat due to climate change. This means that option C is correct because since oceans are getting destroyed, we might not come to know about the life forms we have ended up destroying since we know so little about them.
Incorrect
Ans. C. The passage talks about the fact that we still have not explored much of the life that live in the depth of the ocean and the ocean ecosystem is under huge threat due to climate change. This means that option C is correct because since oceans are getting destroyed, we might not come to know about the life forms we have ended up destroying since we know so little about them.

Question 2 of 5
2. Question
Three bells chime at an interval of 18, 24 and 32 minutes respectively. At a certain time they begin to chime together. What length of time will elapse before they chime together again?
Correct
Solution: B
L.C.M of 18, 24 and 32 = 288
Hence, they would chime after every 288 min. or 4 hrs 48 min.Therefore, option (b) is correct.
Incorrect
Solution: B
L.C.M of 18, 24 and 32 = 288
Hence, they would chime after every 288 min. or 4 hrs 48 min.Therefore, option (b) is correct.

Question 3 of 5
3. Question
If every 2 out of 3 readymade shirts need alterations in the collar, every 3 out or 4 need alterations in the sleeves, and every 4 out of 5 need it in the body, how many alterations will be required for 60 shirts?
Correct
Solution: C
Number of alterations required in 1 shirt =(2/3 + ¾ + 4/5) =133/60.
Therefore, number of alteration required in 60 shirts =(133/60 x 60)= 133.
Hence, option (c) is correct.
Incorrect
Solution: C
Number of alterations required in 1 shirt =(2/3 + ¾ + 4/5) =133/60.
Therefore, number of alteration required in 60 shirts =(133/60 x 60)= 133.
Hence, option (c) is correct.

Question 4 of 5
4. Question
A clock gains 15 minutes per day. It is set right at 12 noon. What time will it show at 4.00 am, the next day ?
Correct
Solution: A
The clock gains 15 min in 24 hours. Therefore, in 16 hours, it will gain 10 minutes. Hence, the time shown by the clock will be 4.10 am.
Hence, option (a) is correct.
Incorrect
Solution: A
The clock gains 15 min in 24 hours. Therefore, in 16 hours, it will gain 10 minutes. Hence, the time shown by the clock will be 4.10 am.
Hence, option (a) is correct.

Question 5 of 5
5. Question
There are 30 different routes connecting two cities Delhi and Meerut. In how many ways can a person go from Delhi to Meerut and return by
a different route?Correct
Solution: D
A person can go from Delhi to Meerut through any of the 30 routes connecting the two cities. Hence, there are 30 ways to go from Delhi to Meerut.
Since he cannot come back through the same route as travelled by him earlier, he has to opt for one of the remaining 29 routes. Therefore he can return to Delhi in 29 ways. Thus, the total number of ways possible = 30 x 29 = 870 ways.
Hence, option (d) is correct.
Incorrect
Solution: D
A person can go from Delhi to Meerut through any of the 30 routes connecting the two cities. Hence, there are 30 ways to go from Delhi to Meerut.
Since he cannot come back through the same route as travelled by him earlier, he has to opt for one of the remaining 29 routes. Therefore he can return to Delhi in 29 ways. Thus, the total number of ways possible = 30 x 29 = 870 ways.
Hence, option (d) is correct.