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
There are 5 members in a family. And their average monthly income is ₹ 10,000/-. The income of a particular member is increased by ₹ 1,20,000 per annum. What is the new average monthly income?
Correct
Answer:
Total income of the family = 5 × Average monthly income
= 5 × ₹ 10,000
= ₹ 50,000
The income of a particular person is increased by ₹ 1,20,000 per annum.
The increment in the monthly income = ₹ 1,20,000 / 12
= ₹ 10,000
The new average monthly income = (₹ 50,000 + ₹ 10,000) / 5
= ₹ 60,000 / 5
= ₹ 12,000
∴ Ans. a) ₹ 12,000
Incorrect
Answer:
Total income of the family = 5 × Average monthly income
= 5 × ₹ 10,000
= ₹ 50,000
The income of a particular person is increased by ₹ 1,20,000 per annum.
The increment in the monthly income = ₹ 1,20,000 / 12
= ₹ 10,000
The new average monthly income = (₹ 50,000 + ₹ 10,000) / 5
= ₹ 60,000 / 5
= ₹ 12,000
∴ Ans. a) ₹ 12,000
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Question 2 of 5
2. Question
The average weight of 8 persons is increased by 2.5 kg when a man with 65 kg is replaced by a new man. Find the weight of the new man?
Correct
Answer:
Let the average weight of 8 persons be ‘x’ kg.
Total weight of 8 persons = 8 × Average weight
= 8 × x
= 8x
(8x + New man’s weight – 65 kg) /8 = x + 2.5
8x – 65 + New man’s weight = 8 × (x + 2.5)
= 8x + 20
∴ New man’s weight = 20 + 65 = 85 kg
∴ Ans. c) 85 kg
Incorrect
Answer:
Let the average weight of 8 persons be ‘x’ kg.
Total weight of 8 persons = 8 × Average weight
= 8 × x
= 8x
(8x + New man’s weight – 65 kg) /8 = x + 2.5
8x – 65 + New man’s weight = 8 × (x + 2.5)
= 8x + 20
∴ New man’s weight = 20 + 65 = 85 kg
∴ Ans. c) 85 kg
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Question 3 of 5
3. Question
In an organization, the average monthly salary of all employees is ₹ 5,000. The average monthly salary of male employees is ₹ 5,200. And that of female employees is ₹ 4,200. What percent of employees are male?
Correct
Answer:
∴ Ans. b) 80%
Incorrect
Answer:
∴ Ans. b) 80%
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Question 4 of 5
4. Question
The average daily expenditure for a person for the first five days is ₹ 120 and for the next four days is ₹ 80. If he has saved total ₹ 25 during the period of nine days, then what is his average daily income?
Correct
Answer:
Total expenditure on five days = ₹ 120 × 5
= ₹ 600
Total expenditure on next four days = ₹ 80 × 4
= ₹ 320
Total Income = Total Expenditure + Savings
= (₹ 600 + ₹ 320) + ₹ 25
= ₹ 920 + ₹ 25
= ₹ 945
∴ His average daily income = Total income/ Number of days
= ₹ 945 / 9
= ₹ 105
∴ Ans. b) ₹ 105
Incorrect
Answer:
Total expenditure on five days = ₹ 120 × 5
= ₹ 600
Total expenditure on next four days = ₹ 80 × 4
= ₹ 320
Total Income = Total Expenditure + Savings
= (₹ 600 + ₹ 320) + ₹ 25
= ₹ 920 + ₹ 25
= ₹ 945
∴ His average daily income = Total income/ Number of days
= ₹ 945 / 9
= ₹ 105
∴ Ans. b) ₹ 105
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Question 5 of 5
5. Question
The average temperature of Tuesday, Wednesday and Thursday was 19⁰C. The average temperature of Wednesday, Thursday and Friday was 20⁰C. If the temperature on Friday was 20⁰C. What was the temperature on Tuesday?
Correct
Answer:
Tuesday + Wednesday + Thursday = 3 days × 19⁰C = 57⁰C
Wednesday + Thursday + Friday = 3 days × 20⁰C = 60⁰C
Wednesday + Thursday + 20⁰C = 60⁰C
Wednesday + Thursday = 60⁰C – 20⁰C
= 40⁰C
Tuesday + Wednesday + Thursday = 57⁰C
Tuesday + 40⁰C = 57⁰C
Tuesday = 57⁰C – 40⁰C = 17⁰C
∴ Ans. d) 17.0⁰C
Incorrect
Answer:
Tuesday + Wednesday + Thursday = 3 days × 19⁰C = 57⁰C
Wednesday + Thursday + Friday = 3 days × 20⁰C = 60⁰C
Wednesday + Thursday + 20⁰C = 60⁰C
Wednesday + Thursday = 60⁰C – 20⁰C
= 40⁰C
Tuesday + Wednesday + Thursday = 57⁰C
Tuesday + 40⁰C = 57⁰C
Tuesday = 57⁰C – 40⁰C = 17⁰C
∴ Ans. d) 17.0⁰C
