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
If the given two numbers are respectively 7% and 28% of a third number, then what percentage is the first of the second?
Correct
Answer : b
Let third number be 100 then
first number =7
second number =28
7/28*100=25%
Incorrect
Answer : b
Let third number be 100 then
first number =7
second number =28
7/28*100=25%
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Question 2 of 5
2. Question
The price of cooking oil has increased by 15%. The percentage of reduction that a family should effect in the use of cooking oil so as not to increase the expenditure on this account is
Correct
Answer : b
Incorrect
Answer : b
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Question 3 of 5
3. Question
A man’s wages were decreased by 50%. Again, the reduced wages were increased by 50%. He has a loss of
Correct
Answer :b
Here, x=-50 and y=50.
∴The net % change in wages = (x +y +xy/100 )%
= ( -15 + 50 -(50*50/100) )% or – 25%.
Since the sign is – Ve, he has a loss of 25%.
Incorrect
Answer :b
Here, x=-50 and y=50.
∴The net % change in wages = (x +y +xy/100 )%
= ( -15 + 50 -(50*50/100) )% or – 25%.
Since the sign is – Ve, he has a loss of 25%.
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Question 4 of 5
4. Question
The radius of a sphere is increased 10%. The surface area increases by
Correct
Answer :a
Since 4πx radius x radius = surface area
∴Net % change in area
= ( x + y+xy/100)%
= ( 10 + 10 +10*10/100)%=21%
Incorrect
Answer :a
Since 4πx radius x radius = surface area
∴Net % change in area
= ( x + y+xy/100)%
= ( 10 + 10 +10*10/100)%=21%
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Question 5 of 5
5. Question
If the side of a square is increased by 30%, its area is increased by
Correct
Answer : b
Since side x side = area
∴Net % change in area = ( x + y +xy/100)%
= ( 30 + 30 +30*30/100 )% = 69%
∴The area is increased by 69%
Incorrect
Answer : b
Since side x side = area
∴Net % change in area = ( x + y +xy/100)%
= ( 30 + 30 +30*30/100 )% = 69%
∴The area is increased by 69%
