Insta–DART (Daily Aptitude and Reasoning Test) 6 January 2021
Insta–DART (Daily Aptitude and Reasoning Test) 2020 - 21
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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
50% of a% of b is 75% of b% of c. Which of the following is c?
Correct
Answer : b
(50/100)x (a/100)x (b) = (75/100) x(b/100) x(c)
→50a = 75c → c = 0.667a
Incorrect
Answer : b
(50/100)x (a/100)x (b) = (75/100) x(b/100) x(c)
→50a = 75c → c = 0.667a
Question 2 of 5
2. Question
A landowner increased the length and the breadth of a rectangular plot by 10% and 20% respectively. Find the percentage change in the cost of the plot assuming land prices are uniform throughout his plot.
Correct
Answer : d
Let the length of plot be=a
And the breadth be=b
So area will be=ab
Now after increasing in length and in breadth by 10% and 20% respectively, so now
Length will be=11/10a
Breadth will be=6/5 b
New area will be=11/10a*6/5b
=66/50ab
Percentage change in area=66/50ab-ab/ab*100
=66-50/50*100
=16*2
=32%
Incorrect
Answer : d
Let the length of plot be=a
And the breadth be=b
So area will be=ab
Now after increasing in length and in breadth by 10% and 20% respectively, so now
Length will be=11/10a
Breadth will be=6/5 b
New area will be=11/10a*6/5b
=66/50ab
Percentage change in area=66/50ab-ab/ab*100
=66-50/50*100
=16*2
=32%
Question 3 of 5
3. Question
The height of a triangle is increased by 40%. What can be the maximum percentage increase in length of the base so that the increase in area is restricted to a maximum of 60%?
Correct
Answer : c
The area of a triangle depends on the product base x height.
Since, the height increases by 40% and the area has to increase by 60% overall,
The required answer will be 20/140*100 = 14.28%
Incorrect
Answer : c
The area of a triangle depends on the product base x height.
Since, the height increases by 40% and the area has to increase by 60% overall,
The required answer will be 20/140*100 = 14.28%
Question 4 of 5
4. Question
The length, breadth and height of a room in the shape of a cuboid are increased by 10%, 20% and 50%, respectively. Find the percentage change in the volume of the cuboid.
Correct
Answer : d
The volume goes up by:
Hence, 98%
Incorrect
Answer : d
The volume goes up by:
Hence, 98%
Question 5 of 5
5. Question
The salary of Amit is 30% more than that of Varun. Find by what percentage is the salary of Varun less than that of Amit?
Correct
Answer: b
Let the salary of varun be 100
So salary of Amit will be-130
Then the salary of varun less than that of Amit will be=(130-100)/130*100
∴Answer = 30/130*100 = 23.07%
Incorrect
Answer: b
Let the salary of varun be 100
So salary of Amit will be-130
Then the salary of varun less than that of Amit will be=(130-100)/130*100
∴Answer = 30/130*100 = 23.07%
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