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
The ratio between the present ages of A and B is 4:5. If the ratio between their ages 4 yr hence becomes 14:17, then what is B’s age at present?
Correct
Answer : a
Let the ages of A and B are 4x and 5x yr, respectively
According to the question,
According to the question,
(4x+4)/5x+4) =(14/17)
68x+68 = 70x +56
2x = 12
X=6
Hence, present age of B = 5 * 6 = 30 yr
Incorrect
Answer : a
Let the ages of A and B are 4x and 5x yr, respectively
According to the question,
According to the question,
(4x+4)/5x+4) =(14/17)
68x+68 = 70x +56
2x = 12
X=6
Hence, present age of B = 5 * 6 = 30 yr
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Question 2 of 5
2. Question
In a family, the average age of father and mother is 35 yr. The average age of the father, mother and their only son is 27 yr. What is the age of the son?
Correct
Answer : b
Total age of father and mother = 35*2 =70 yr
And total age of father, mother and son = 27 * 3 = 81 yr
∴Age of son = 81 – 70 = 11 yr
Incorrect
Answer : b
Total age of father and mother = 35*2 =70 yr
And total age of father, mother and son = 27 * 3 = 81 yr
∴Age of son = 81 – 70 = 11 yr
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Question 3 of 5
3. Question
The ages of Harsh and Sumit are 40 and 60 yr, respectively. How many years before the ratio of their ages was 3:5?
Correct
Answer : d
Let x yr before, the ratio of their ages was 3:5
According to the question,
[(40-x)/(60-x)] = (3/5)
200 – 5x = 180 – 3x
2x = 20
∴x = 10
Incorrect
Answer : d
Let x yr before, the ratio of their ages was 3:5
According to the question,
[(40-x)/(60-x)] = (3/5)
200 – 5x = 180 – 3x
2x = 20
∴x = 10
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Question 4 of 5
4. Question
The average age of a man and his son is 27 yr. The ratio of their ages is 8:1 respectively. What will be the son’s age after 6 yr?
Correct
Answer : c
Let ages of man and his son are 8x yr and x yr, respectively.
According to the question,
[(8x+x)/(2 )] = 27
x = [(27*2)/(9)]=6
Hence, age of son after 6 yr = 6+6 = 12yr
Incorrect
Answer : c
Let ages of man and his son are 8x yr and x yr, respectively.
According to the question,
[(8x+x)/(2 )] = 27
x = [(27*2)/(9)]=6
Hence, age of son after 6 yr = 6+6 = 12yr
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Question 5 of 5
5. Question
At present, the ratio of the ages of Maya and Chhaya is 6:5 and fifteen years from now, the ratio will get changed to 9:8 Maya’s present age is
Correct
Answer : c
Let the present ages of Maya and Chhaya are 6x and 5x yr, respectively.
According to the question,
After 15 yr,
[(6x+15)/(5x+15)] = (9/8)
48x +120=45x +135
3x = 15
∴x = 5
Hence, present age of Maya = 5 *6 = 30 yr
Incorrect
Answer : c
Let the present ages of Maya and Chhaya are 6x and 5x yr, respectively.
According to the question,
After 15 yr,
[(6x+15)/(5x+15)] = (9/8)
48x +120=45x +135
3x = 15
∴x = 5
Hence, present age of Maya = 5 *6 = 30 yr
