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.
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Question 1 of 5
1. Question
Over recent decades, the scale of global material consumption has increased substantially, while only a small fraction of these materials is reintroduced into production cycles. Many modern technologies rely on minerals that are costly and difficult to source, often moving through extended supply chains shaped by varying environmental and labour conditions.
At later stages of use, such products continue to contain materials of potential value. Processes that recover and reprocess these components are examined in relation to resource availability, production risks and patterns of material use across industries.
Which one of the following statements best reflects the most logical, rational and pragmatic message conveyed by the passage?
Correct
Answer: (a)
Explanation
Option (b) is incorrect:
The passage focuses on reuse and recovery rather than expansion of extraction activities.Option (c) is incorrect:
Environmental and labour concerns are mentioned, but not identified as the primary global source.Option (d) is incorrect:
The passage indicates that materials retain value even after initial use.Option (a) is correct:
The passage links recovery and reuse of materials with issues of availability, risk and production patterns.Incorrect
Answer: (a)
Explanation
Option (b) is incorrect:
The passage focuses on reuse and recovery rather than expansion of extraction activities.Option (c) is incorrect:
Environmental and labour concerns are mentioned, but not identified as the primary global source.Option (d) is incorrect:
The passage indicates that materials retain value even after initial use.Option (a) is correct:
The passage links recovery and reuse of materials with issues of availability, risk and production patterns. -
Question 2 of 5
2. Question
With reference to the above passage, the following assumptions have been made:
I. Materials contained in end-of-life products may continue to have economic relevance.
II. Reintroduction of materials into production processes can affect resource-related constraints.Which of the above assumptions is/are valid?
Correct
Answer: (c)
Explanation
Statement I is correct:
The passage notes that used products still contain valuable materials that can be recovered.Statement II is correct:
It suggests that recovery processes are linked to resource availability and production risks.Incorrect
Answer: (c)
Explanation
Statement I is correct:
The passage notes that used products still contain valuable materials that can be recovered.Statement II is correct:
It suggests that recovery processes are linked to resource availability and production risks. -
Question 3 of 5
3. Question
What percent of water must be mixed with juice so as to gain 15% by selling the mixture at the cost price of juice?
Correct
Answer: (c)
Explanation
Let cost price of 1 litre juice = Rs. 1
Then cost price of 100 litres juice = Rs. 100
Now x litres water is mixed with 100 litres juice
Total mixture = (100 + x) litres
Selling price is calculated at the cost price of juice, so
Selling price = Rs. (100 + x)
For 15% profit,
SP = 100 × 1.15 = 115
So,
100 + x = 115
x = 15
Thus, 15 litres water is mixed with 100 litres juice.
Percent of water mixed
= (15 / 100) × 100
= 15%Hence, option c is the correct answer.
Incorrect
Answer: (c)
Explanation
Let cost price of 1 litre juice = Rs. 1
Then cost price of 100 litres juice = Rs. 100
Now x litres water is mixed with 100 litres juice
Total mixture = (100 + x) litres
Selling price is calculated at the cost price of juice, so
Selling price = Rs. (100 + x)
For 15% profit,
SP = 100 × 1.15 = 115
So,
100 + x = 115
x = 15
Thus, 15 litres water is mixed with 100 litres juice.
Percent of water mixed
= (15 / 100) × 100
= 15%Hence, option c is the correct answer.
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Question 4 of 5
4. Question
If P % Q means P is the son of Q, P x Q means P is the sister of Q and P – Q means P is the father of Q, then consider the following statements:
Statement I: The operation R x S x T means R is the sister of T.
Statement II: The operation R % S – T means R is the grandson of T.Which among the following statement is/are correct?
Correct
Answer: (a)
Explanation
Statement I:
R x S means R is the sister of S.
S x T means S is the sister of T.So, R and S are sisters, and S and T are siblings.
This means R is also sibling of T.
Since R is female, R is the sister of T.So, Statement I is correct.
Statement II:
R % S means R is the son of S.
S – T means S is the father of T.So, R is son of S, and T is also child of S.
Therefore, R and T are siblings.
R is not grandson of T.So, Statement II is incorrect.
Hence, only Statement I is correct
Incorrect
Answer: (a)
Explanation
Statement I:
R x S means R is the sister of S.
S x T means S is the sister of T.So, R and S are sisters, and S and T are siblings.
This means R is also sibling of T.
Since R is female, R is the sister of T.So, Statement I is correct.
Statement II:
R % S means R is the son of S.
S – T means S is the father of T.So, R is son of S, and T is also child of S.
Therefore, R and T are siblings.
R is not grandson of T.So, Statement II is incorrect.
Hence, only Statement I is correct
-
Question 5 of 5
5. Question
In an examination hall, candidates are arranged in rows. If they are seated in rows of 12 each, 8 candidates are left. If seated in rows of 16 each, 12 candidates are left. If seated in rows of 20 each, 16 candidates are left. What is the minimum number of candidates in the hall?
Correct
Answer: (a)
Explanation
Let total number of candidates be N.
Given:
N leaves remainder 8 when divided by 12
N leaves remainder 12 when divided by 16
N leaves remainder 16 when divided by 20Here also, each remainder is 4 less than the divisor.
So,
N + 4 is divisible by 12, 16 and 20
Now find LCM of 12, 16 and 20
12 = 2² × 3
16 = 2⁴
20 = 2² × 5LCM = 2⁴ × 3 × 5 = 240
Therefore,
N + 4 = 240
N = 236Hence, option (a) is correct.
Incorrect
Answer: (a)
Explanation
Let total number of candidates be N.
Given:
N leaves remainder 8 when divided by 12
N leaves remainder 12 when divided by 16
N leaves remainder 16 when divided by 20Here also, each remainder is 4 less than the divisor.
So,
N + 4 is divisible by 12, 16 and 20
Now find LCM of 12, 16 and 20
12 = 2² × 3
16 = 2⁴
20 = 2² × 5LCM = 2⁴ × 3 × 5 = 240
Therefore,
N + 4 = 240
N = 236Hence, option (a) is correct.
