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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
The average of 40 clinical observations is 13. While entering the observations, 3 and 6 were wrongly entered 8 and 9. What is the correct average?
Correct
Solution: a) 13.2
Explanation:
Due to wrong entry 3 and 6 were entered as 8 and 9.
Therefore, the excess in the total of observations = (8-3) + (9-6) = 5 + 3 = 8
Therefore the correct average = 13 + (8/40) = 13 + 0.2 = 13.
Incorrect
Solution: a) 13.2
Explanation:
Due to wrong entry 3 and 6 were entered as 8 and 9.
Therefore, the excess in the total of observations = (8-3) + (9-6) = 5 + 3 = 8
Therefore the correct average = 13 + (8/40) = 13 + 0.2 = 13.
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Question 2 of 5
2. Question
Direction for the questions (2-3Q):
Five cricket players Rahul, Ganguli, Kaif, Kohli and Sehwag advertise different products of different companies- Airtel, Yes, Nirma, DLF and Royal Stag, though not necessarily respectively. Read the following conditions.
- Ganguli advertises neither for Sportswear nor for Cameras.
- Rahul advertises for Shoes but not for company Airtel.
- Royal Stag and Yes produce neither Sportswear nor Watches.
- Kaif advertises for the company DLF but neither for Bikes nor for Watches.
- Kohli and Sehwag advertise for Yes and Royal Stag though not necessarily respectively.
- Airtel does not produce Bikes.
Which of the Player-Product-Company combination is definitely true?
Correct
Solution: c) Ganguli-Watches-Airtel
Explanation:
The following table can be built for the information given in the question:
We have to begin with the table which tells Yes and No about the choices
Person Product Yes Company Yes Product No Company No Ganguli Sportwear/Cameras Rahul Shoes Airtel Kaif DLF Bikes/watches Kohli Yes/Royal Stag Sportswear/watches Sehwag Yes/Royal Stag Sportswear/watches By ruling out the products and companies, we get the conclusion as follows.
Person Product Company Ganguli Watches Airtel Rahul Shoes Nirma Kaif Sports DLF Kohli Bikes/Cameras Yes/Royal Stag Sehwag Bikes/Cameras Yes/Royal Stag Ganguli-Watches-Airtel was the right combination.
Incorrect
Solution: c) Ganguli-Watches-Airtel
Explanation:
The following table can be built for the information given in the question:
We have to begin with the table which tells Yes and No about the choices
Person Product Yes Company Yes Product No Company No Ganguli Sportwear/Cameras Rahul Shoes Airtel Kaif DLF Bikes/watches Kohli Yes/Royal Stag Sportswear/watches Sehwag Yes/Royal Stag Sportswear/watches By ruling out the products and companies, we get the conclusion as follows.
Person Product Company Ganguli Watches Airtel Rahul Shoes Nirma Kaif Sports DLF Kohli Bikes/Cameras Yes/Royal Stag Sehwag Bikes/Cameras Yes/Royal Stag Ganguli-Watches-Airtel was the right combination.
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Question 3 of 5
3. Question
Which of the Player-Company-Product combination according to the information given in the question is definitely false?
Correct
Solution: a) Rahul-DLF-Shoes
Explanation:
Refer the explanation for the previous question.
The combination Rahul-DLF-Shoes is definitely false because it is given in the information in the question that Kaif advertises for DLF.
Incorrect
Solution: a) Rahul-DLF-Shoes
Explanation:
Refer the explanation for the previous question.
The combination Rahul-DLF-Shoes is definitely false because it is given in the information in the question that Kaif advertises for DLF.
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Question 4 of 5
4. Question
Statement: As there is a great demand, every person seeking tickets of the programme will be given only five tickets.
Assumptions:- The organizers are not keen on selling the tickets.
2. No one is interested in getting more than five tickets.
Correct
Correct Answer: D) Neither 1 nor 2 is implicit
Explanation:
Clearly, the organizers are adopting this policy not to reduce the sale but to cope up with great demand so that everyone can get the ticket. So, 1 is not implicit. Also, due to great demand, the maximum number of tickets one person can get has been reduced to five. So, 2 is also not implicit.
Incorrect
Correct Answer: D) Neither 1 nor 2 is implicit
Explanation:
Clearly, the organizers are adopting this policy not to reduce the sale but to cope up with great demand so that everyone can get the ticket. So, 1 is not implicit. Also, due to great demand, the maximum number of tickets one person can get has been reduced to five. So, 2 is also not implicit.
- The organizers are not keen on selling the tickets.
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Question 5 of 5
5. Question
A mixture of water and milk contains 80% milk. In 50 litres of such a mixture, how many litres of water must be added to increase the percentage of water to 50%?
Correct
Solution: c) 30
Justification:
In the mixture of 50 litres, 80% is milk.
So, the quantity of milk = 80% of 50 = 40 litres.
The quantity of water = 50 – 40 = 10 litres.
To make percentage of water as 50%, the quantity of milk and water must be same.
Therefore, the quantity of water has to be 40 litres.
The required quantity of water to be added = 40 – 10 = 30 litres.
Incorrect
Solution: c) 30
Justification:
In the mixture of 50 litres, 80% is milk.
So, the quantity of milk = 80% of 50 = 40 litres.
The quantity of water = 50 – 40 = 10 litres.
To make percentage of water as 50%, the quantity of milk and water must be same.
Therefore, the quantity of water has to be 40 litres.
The required quantity of water to be added = 40 – 10 = 30 litres.
