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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
How many natural numbers between 100 to 500 are multiples of 9?
Correct
Ans-a
The series will be 108, 117, 126, ….495.
Hence, Answer = [(495-108)/9]+1 =44. Option (a) is correct.
Incorrect
Ans-a
The series will be 108, 117, 126, ….495.
Hence, Answer = [(495-108)/9]+1 =44. Option (a) is correct.
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Question 2 of 5
2. Question
The sum of the first 20 terms of an AP whose first term and third term are 25 and 35, respectively is
Correct
Ans-d
a = 25, a + 2d= 35 means d =5. The 20th term would be a + 19d= 25 +95 = 120. The sum of the series would be given by: |20/2] x [25 + 120]= 1450. Option (d) is correct.
Incorrect
Ans-d
a = 25, a + 2d= 35 means d =5. The 20th term would be a + 19d= 25 +95 = 120. The sum of the series would be given by: |20/2] x [25 + 120]= 1450. Option (d) is correct.
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Question 3 of 5
3. Question
A number 39 is divided into three parts which are in A.P. and the sum of their squares is 515. Find the largest
Correct
Ans-b
The three parts are 11, 13 and 15 since 112 + 132 +152 =515. Since, we want the largest number, the answer would be 15. Option (b) is correct.
Incorrect
Ans-b
The three parts are 11, 13 and 15 since 112 + 132 +152 =515. Since, we want the largest number, the answer would be 15. Option (b) is correct.
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Question 4 of 5
4. Question
If a clock strikes once at 12 A.M., twice at 1 A.M., thrice at 2 A.M. and so on, how many times will the clock be struck in the course of 3 days?
Correct
Ans-b
In a period of l day or 24 hours the clock would strike 1 +2+3+…+23 276 times. In the course-of 3 days the clock would strike 276 x 3 828. Option (b) is correct.
Incorrect
Ans-b
In a period of l day or 24 hours the clock would strike 1 +2+3+…+23 276 times. In the course-of 3 days the clock would strike 276 x 3 828. Option (b) is correct.
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Question 5 of 5
5. Question
What will be the maximum sum of 54, 52, 50,…..?
Correct
Ans-c
Since this is a decreasing A.P. with first term positive, the maximum sum will occur upto the point where the progression remains non-negative. 54, 52, 50, ……0
Hence, 28 terms x 27 =756. Option (c) is correct.
Incorrect
Ans-c
Since this is a decreasing A.P. with first term positive, the maximum sum will occur upto the point where the progression remains non-negative. 54, 52, 50, ……0
Hence, 28 terms x 27 =756. Option (c) is correct.
