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 CSP2021. 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
The value of k that must be added to 7, 16, 43, 79 so that they are in proportion, is
Correct
Answer : b
According to given condition
7 + k : 16 + K :: 43 + k : 79 + k
7+k/16+k=43+k/79+k
Going by options we can find that x = 5
Incorrect
Answer : b
According to given condition
7 + k : 16 + K :: 43 + k : 79 + k
7+k/16+k=43+k/79+k
Going by options we can find that x = 5

Question 2 of 5
2. Question
The number that must be added to each of the numbers 8, 21, 13 and 31 to make the ratio of first two numbers equal to the ratio of last two number is
Correct
Answer : a
Let x be the desired number then = 8+x/21+x=13+x/31+x
Going by options we can easily find that x = 5
Incorrect
Answer : a
Let x be the desired number then = 8+x/21+x=13+x/31+x
Going by options we can easily find that x = 5

Question 3 of 5
3. Question
The incomes of A and B are in the ratio 3:2 and their expenditures in the ratio 5 : 3. If each saves Rs. 1000, A’s income is
Correct
Answer : b
Let income be 3x : 2x
And expenditure be 5y : 3y
Then 3x – 5y = 1000
2x – 3y = 1000
X = 2000
Y = 1000
So A’s income will be 3x = 6000.
Incorrect
Answer : b
Let income be 3x : 2x
And expenditure be 5y : 3y
Then 3x – 5y = 1000
2x – 3y = 1000
X = 2000
Y = 1000
So A’s income will be 3x = 6000.

Question 4 of 5
4. Question
A, B , C and D enter into partnership. A subscribes 1/3 of the capital, B 1/4 , C 1/5 and D the rest. What is the share of D out of a profit of Rs. 6000?
Correct
Answer: d
D’s Capital = 1 – 1/3 – 1/4 – 1/5 = 13/60
Profit ratio of A, B , C, D is 1/3 : 1/4 : 1/5 : 13/60∴20 : 15 : 12 : 13
∴Share of D = 13/60 x Rs. 6000 = Rs. 1300.Incorrect
Answer: d
D’s Capital = 1 – 1/3 – 1/4 – 1/5 = 13/60
Profit ratio of A, B , C, D is 1/3 : 1/4 : 1/5 : 13/60∴20 : 15 : 12 : 13
∴Share of D = 13/60 x Rs. 6000 = Rs. 1300. 
Question 5 of 5
5. Question
A and B started a business with initial investments in the ratio 5 : 7. If after one year their profits were in the ratio 1 : 2 and the period for A’s investment was 7 months, B invested the money for
Correct
Answer : c
Let investments of A and B respectively be 5x and 7x and period of B’s investment be y months.
Then, (5x)*7/(7x)*y=1/2 = y = 10
Incorrect
Answer : c
Let investments of A and B respectively be 5x and 7x and period of B’s investment be y months.
Then, (5x)*7/(7x)*y=1/2 = y = 10