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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
The number of oranges in three baskets are in the ratio of 3: 4 : 5. In which ratio the no. of oranges in first two baskets must be increased so that the new ratio becomes 5: 4: 3?
Correct
Your Answer : B
Explanation : B1 : B2 : B3 = 3x : 4x : 5x again B1 : B2 : B3 =5y:4y:3y .
Since there is increase in no. of oranges in first two basket only, it means the no. of oranges remains constant in the third basket Hence 5x =3y 3x : 4x : 5x 9y/5 : 12y/ 5 : 15y/ 5 = 9y : 12y : 15y and 5y : 4y : 3y= 25y : 20y : 15y
Therefore, increase in first basket = 16 and increase in second basket = 8 the required ratio = 2 : 1
Incorrect
Your Answer : B
Explanation : B1 : B2 : B3 = 3x : 4x : 5x again B1 : B2 : B3 =5y:4y:3y .
Since there is increase in no. of oranges in first two basket only, it means the no. of oranges remains constant in the third basket Hence 5x =3y 3x : 4x : 5x 9y/5 : 12y/ 5 : 15y/ 5 = 9y : 12y : 15y and 5y : 4y : 3y= 25y : 20y : 15y
Therefore, increase in first basket = 16 and increase in second basket = 8 the required ratio = 2 : 1
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Question 2 of 5
2. Question
What is Mohan’s present age, if after 30 years his age will be 10 times of his age 10 years back?
Correct
Your Answer – C
Explanation: Let Mohan’s present age be x Mohan’s age before 10 years = x – 10) Mohan’s age after 30 years = (x + 30) We are given that, Mohan’s age after 30 years (x + 30) is 10 times his age 10 years back (x – 10) Therefore, (x + 30) = 10 (x – 10) Solving the equation, we get x + 30 = 10x – 100 9x = 130, x = 14.4 years
Incorrect
Your Answer – C
Explanation: Let Mohan’s present age be x Mohan’s age before 10 years = x – 10) Mohan’s age after 30 years = (x + 30) We are given that, Mohan’s age after 30 years (x + 30) is 10 times his age 10 years back (x – 10) Therefore, (x + 30) = 10 (x – 10) Solving the equation, we get x + 30 = 10x – 100 9x = 130, x = 14.4 years
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Question 3 of 5
3. Question
A person purchased 30 apples for Rs 11 each and sold each apple at a different price,every price is between 1 and 30 both inclusive then what is his loss/profit percent?
Correct
Answer : B: Explanation: Total Cost price = 30 × 11 = 330 As we have 30 different prices and 30 apples and each apple is sold at a different price and so Total SP = 1 + 2 + 3 + 4 ….. 30 = 30(30+1)/2 = 465 Loss percent = (330–465/330) × 100 = (-135/330)* 100 = (- 40.9%) — loss
Incorrect
Answer : B: Explanation: Total Cost price = 30 × 11 = 330 As we have 30 different prices and 30 apples and each apple is sold at a different price and so Total SP = 1 + 2 + 3 + 4 ….. 30 = 30(30+1)/2 = 465 Loss percent = (330–465/330) × 100 = (-135/330)* 100 = (- 40.9%) — loss
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Question 4 of 5
4. Question
Find the side of the largest square slab which can be paved on the floor of a room 5 meters 44cm long and 3 meters 74 cm broad.
Correct
Answer -D
The side of the square slab is the H.C.F. of 544 and 374 cm i.e. 34.
Incorrect
Answer -D
The side of the square slab is the H.C.F. of 544 and 374 cm i.e. 34.
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Question 5 of 5
5. Question
The difference between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of that number?
Correct
Answer – B
Answer Justification : Let the ten’s digit be x and unit’s digit be y.
Then, (10x + y) – (10y + x) = 36 9(x – y) = 36 x – y = 4.
Incorrect
Answer – B
Answer Justification : Let the ten’s digit be x and unit’s digit be y.
Then, (10x + y) – (10y + x) = 36 9(x – y) = 36 x – y = 4.
