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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 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).
Wish you all the best ! 🙂
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Question 1 of 5
1. Question
Nishu and Archana can do a piece of work in 10 days and Nishu alone can do it in 12 days. In how many days can Archana do it alone?
Correct
Answer : a
N+ A = 10%
N = 8.33%
Hence A = 1.66% → 60 days.
Incorrect
Answer : a
N+ A = 10%
N = 8.33%
Hence A = 1.66% → 60 days.
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Question 2 of 5
2. Question
Baba alone can do a piece of work in 10 days. Anshu alone can do it in 15 days. If the total wages for the work is 50. How much should Baba be paid if they work together for the entire duration of the Work?
Correct
Answer : a
The ratio of the wages will be the inverse of the ratio of the number of days required by each to do the work. Hence, the correct answer will be 3:2 → 30
Incorrect
Answer : a
The ratio of the wages will be the inverse of the ratio of the number of days required by each to do the work. Hence, the correct answer will be 3:2 → 30
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Question 3 of 5
3. Question
A can do a piece of work in 20 days. He works at it for 5 days and then B finishes it in 10 more days. In how many days will A and B together finish the work?
Correct
Answer : a
In 5 days, A would do 25% of the work. Since, B finishes the remaining 75% work in 10 days, we can conclude that B’s work in a day= 7.5%
Thus, (4 t B) = 12.5% per day.
together they would take 100/12.5= 8 days.
Incorrect
Answer : a
In 5 days, A would do 25% of the work. Since, B finishes the remaining 75% work in 10 days, we can conclude that B’s work in a day= 7.5%
Thus, (4 t B) = 12.5% per day.
together they would take 100/12.5= 8 days.
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Question 4 of 5
4. Question
A can do a piece of work in 10 days, and B can do the same work in 20 days. With the help of C, they finished the work in 4 days. C can do the work in how many days, working alone?
Correct
Answer : b
Explanation:Their combined 4 day work = 4(1/10 + 1/15) = 12/20 = 3/5.
Remaining work = 1 – 3/5 = ⅖.
This means C did 2/5 work in 4 days, hence he can finish the complete work in 5/2 × 4 = 10 days.Incorrect
Answer : b
Explanation:Their combined 4 day work = 4(1/10 + 1/15) = 12/20 = 3/5.
Remaining work = 1 – 3/5 = ⅖.
This means C did 2/5 work in 4 days, hence he can finish the complete work in 5/2 × 4 = 10 days. -
Question 5 of 5
5. Question
A can do a piece of work in 12 days. B can do this work in 16 days. A started the work alone. After how many days should B join him, so that the work is finished in 9 days?
Correct
Answer : D
Explanation:A’s work in 9 days = 9/12 = 3/4. Remaining work = 1/4.
This work was done by B in 1/4 × 16 = 4 days.
∴ B would have joined A after 9 – 4 = 5 days.Incorrect
Answer : D
Explanation:A’s work in 9 days = 9/12 = 3/4. Remaining work = 1/4.
This work was done by B in 1/4 × 16 = 4 days.
∴ B would have joined A after 9 – 4 = 5 days.
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