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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).
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Question 1 of 5
1. Question
Three years ago, the average age of A, B and C was 27 years and that of B andC5 years ago was 20 years. A’s present age is
Correct
Ans-c
Today’s total age of A, B and C= 30 x 3 =90.
Today’s total age for B and C= 25 x 2 = 50.
C’s age =90- 50 = 40.
Incorrect
Ans-c
Today’s total age of A, B and C= 30 x 3 =90.
Today’s total age for B and C= 25 x 2 = 50.
C’s age =90- 50 = 40.
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Question 2 of 5
2. Question
The average height of 30 girls out of a class of 40 is 160 cm and that of the remaining girls is 156 cm. The average height of the whole class is
Correct
Ans-c
(30 x 160 + 10x 156)/40 = 159. (note this question can also be solved using the allegation method explained in the chapter.
Incorrect
Ans-c
(30 x 160 + 10x 156)/40 = 159. (note this question can also be solved using the allegation method explained in the chapter.
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Question 3 of 5
3. Question
The average weight of 6 men is 68.5 kg. 11it is Known that Ram and Tram weigh 60 kg each, find the average weight of the others.
Correct
Ans-a
Total weight of all 6= 68.5 x 6. Total weigh of Ram and Tram 60 x 2-120. Average weight of
Ram and Tram = 60x 2 = 120. Average weight of the 4 people excluding Ram and Tram = (68.5 x 6-120)/4 = 72.75 kg.
Incorrect
Ans-a
Total weight of all 6= 68.5 x 6. Total weigh of Ram and Tram 60 x 2-120. Average weight of
Ram and Tram = 60x 2 = 120. Average weight of the 4 people excluding Ram and Tram = (68.5 x 6-120)/4 = 72.75 kg.
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Question 4 of 5
4. Question
The average salary per head of all employees of a company is Rs. 600. The average salary of 120 officers is Rs. 4000. If the average salary per head of the rest of the employees is560, find the total number of workers in the company.
Correct
Ans-b
From the figure it is clear that the ratio of the number of officers to the number of other employees would be 40:3400. Since there are 120 officers, there would be 3400 x 3 = 10200 workers in the company. Thus the total number of employees would be 10200 +120 = 10320.
Incorrect
Ans-b
From the figure it is clear that the ratio of the number of officers to the number of other employees would be 40:3400. Since there are 120 officers, there would be 3400 x 3 = 10200 workers in the company. Thus the total number of employees would be 10200 +120 = 10320.
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Question 5 of 5
5. Question
How many kilograms of sugar worth 3.60 per kg Should be mixed with 8 kg of sugar worth Rs. 4.20 per kg, such that by selling the mixture at Rs. 4.40 per kg, there may be a gain of 10%?
Correct
Ans-d
Since by selling at Rs. 4.40 we want a profit of 10%, it means that the average cost required is RS. 4 per kg. Mixing sugar worth Rs. 3.6/kg and Rs. 4.2/kg to get 4/kg means a mixture ratio of 1:2. Thus, to 8 kg of the second variety we need to add 4 kg of the first variety to get the required cost price.
Incorrect
Ans-d
Since by selling at Rs. 4.40 we want a profit of 10%, it means that the average cost required is RS. 4 per kg. Mixing sugar worth Rs. 3.6/kg and Rs. 4.2/kg to get 4/kg means a mixture ratio of 1:2. Thus, to 8 kg of the second variety we need to add 4 kg of the first variety to get the required cost price.
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