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
If the average temperature of first four days of week was 39°C and the average temperature of the week was 40ºC, then what was the average temperature of the last three days of the week?
Correct
Answer: D
Explanation
Total temperature of first four days=39*4=156
Total temperature of the week is=40*7=280
Total temperature of last three days=280-156=124
Average temperature of last three days =124/3=41.33
Incorrect
Answer: D
Explanation
Total temperature of first four days=39*4=156
Total temperature of the week is=40*7=280
Total temperature of last three days=280-156=124
Average temperature of last three days =124/3=41.33
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Question 2 of 5
2. Question
If the difference between the average of 1st, 2nd and 2nd, 3rd is 12, then find the difference between 1st and 3rd number?
Correct
Answer: D
Explanation
Let the 1st number is a, 2nd number is b and 3rd number is c.
Accrediting to the question,
(a+b)/2 – (b+c)/2=12
Or, a+b-b-c=24
Or, a-c=24
So difference of first and third number is 24
Incorrect
Answer: D
Explanation
Let the 1st number is a, 2nd number is b and 3rd number is c.
Accrediting to the question,
(a+b)/2 – (b+c)/2=12
Or, a+b-b-c=24
Or, a-c=24
So difference of first and third number is 24
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Question 3 of 5
3. Question
The average of 8 numbers is 14.The average of 6 of these numbers is 16.What is the average of the remaining two numbers?
Correct
Answer: C
Explanation
Sum of 8 numbers is =14*8=112
Sum of 6 number is=6*16=96
So sum of remaining two is=112-96=16
So average of remaining two is=16/2=8
Incorrect
Answer: C
Explanation
Sum of 8 numbers is =14*8=112
Sum of 6 number is=6*16=96
So sum of remaining two is=112-96=16
So average of remaining two is=16/2=8
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Question 4 of 5
4. Question
The average marks of 30 students in class is 47.While checking two errors were noticed after correction, one student got 45 marks more and others 12 marks less. What is correct average?
Correct
Answer: B
Explanation
Total marks of 30 students is=47*30=1410
After correction total marks of 30 student is=1410-45+12=1377
So new average of 50 student is =1377/30=45.9
Incorrect
Answer: B
Explanation
Total marks of 30 students is=47*30=1410
After correction total marks of 30 student is=1410-45+12=1377
So new average of 50 student is =1377/30=45.9
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Question 5 of 5
5. Question
Average age of 32 students in a class is 14 years. The age of their teacher is 41 years, what is the average age of the students and teacher combined?
Correct
Answer: B
Explanation
Total age of 32 student of the class is=32*14=448
Total age when teacher included is=448+41=489
So average when teacher included is=489/33=14.81
Incorrect
Answer: B
Explanation
Total age of 32 student of the class is=32*14=448
Total age when teacher included is=448+41=489
So average when teacher included is=489/33=14.81
