UPSC Insta–DART (Daily Aptitude and Reasoning Test) 25 Feb 2026

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).

#### Quiz-summary

0 of 5 questions completed

Questions:

#### Information

Best of Luck! 🙂

You have already completed the quiz before. Hence you can not start it again.

Quiz is loading...

You must sign in or sign up to start the quiz.

You have to finish following quiz, to start this quiz:

0 of 5 questions answered correctly

Your time:

Time has elapsed

You have reached 0 of 0 points, (0)

#### Categories

• Not categorized 0%

• Question 1 of 5 1. Question A is thrice as efficient as B. Together they can finish a work in 12 days. How long will B alone take to finish the same work? (a) 24 days (b) 30 days (c) 36 days (d) 48 days Correct Answer: (d) Explanation: Efficiency ratio A : B = 3 : 1. So time ratio = 1 : 3. Let B’s one-day work = 1 unit, then A’s = 3 units. Together = 4 units per day. If work is completed in 12 days → Total work = 12 × 4 = 48 units. So, B alone takes = 48 ÷ 1 = 48 days. Hence option (d) is correct. Incorrect Answer: (d) Explanation: Efficiency ratio A : B = 3 : 1. So time ratio = 1 : 3. Let B’s one-day work = 1 unit, then A’s = 3 units. Together = 4 units per day. If work is completed in 12 days → Total work = 12 × 4 = 48 units. So, B alone takes = 48 ÷ 1 = 48 days. Hence option (d) is correct.

#### 1. Question

A is thrice as efficient as B. Together they can finish a work in 12 days. How long will B alone take to finish the same work?

• (a) 24 days

• (b) 30 days

• (c) 36 days

• (d) 48 days

Answer: (d) Explanation: Efficiency ratio A : B = 3 : 1. So time ratio = 1 : 3. Let B’s one-day work = 1 unit, then A’s = 3 units. Together = 4 units per day. If work is completed in 12 days → Total work = 12 × 4 = 48 units. So, B alone takes = 48 ÷ 1 = 48 days. Hence option (d) is correct.

• Question 2 of 5 2. Question A tank can be filled by a pipe in 12 hours and by another pipe in 18 hours. A third pipe can empty the tank in 36 hours. If all the three pipes are opened together, how much time will they take to fill the tank? (a) 9 hours (b) 10 hours (c) 12 hours (d) 15 hours Correct Answer: (a) Explanation: Work per hour: Pipe 1 = 1/12, Pipe 2 = 1/18, Pipe 3 = –1/36 (since it empties). Network/hour = 1/12 + 1/18 – 1/36. Take LCM = 36 → (3 + 2 – 1)/36 = 4/36 = 1/9. So, they fill 1/9 of tank per hour. Therefore, total time = 9 hours. Hence option (a) is correct. Incorrect Answer: (a) Explanation: Work per hour: Pipe 1 = 1/12, Pipe 2 = 1/18, Pipe 3 = –1/36 (since it empties). Network/hour = 1/12 + 1/18 – 1/36. Take LCM = 36 → (3 + 2 – 1)/36 = 4/36 = 1/9. So, they fill 1/9 of tank per hour. Therefore, total time = 9 hours. Hence option (a) is correct.

#### 2. Question

A tank can be filled by a pipe in 12 hours and by another pipe in 18 hours. A third pipe can empty the tank in 36 hours. If all the three pipes are opened together, how much time will they take to fill the tank?

• (a) 9 hours

• (b) 10 hours

• (c) 12 hours

• (d) 15 hours

Answer: (a) Explanation: Work per hour: Pipe 1 = 1/12, Pipe 2 = 1/18, Pipe 3 = –1/36 (since it empties). Network/hour = 1/12 + 1/18 – 1/36. Take LCM = 36 → (3 + 2 – 1)/36 = 4/36 = 1/9. So, they fill 1/9 of tank per hour. Therefore, total time = 9 hours. Hence option (a) is correct.

• Question 3 of 5 3. Question 12 men and 24 women can finish a work in 10 days. The same work can be finished by 24 men and 12 women in 8 days. How long will 20 men and 8 women take? (a) 8 days (b) 9 days (c) 10 days (d) 12 days Correct Answer: (c) Explanation: Let 1 man’s 1 day’s work = x and 1 woman’s 1 day’s work = y. Then, 12x + 24y = 1/10 …(I) 24x + 12y = 1/8 …(II) Multiply (I) by 2: 24x + 48y = 1/5. Subtract (II): (24x + 48y) − (24x + 12y) = 1/5 − 1/8 ⇒ 36y = (8−5)/40 = 3/40 ⇒ y = (3/40)/36 = 1/480. Put y in (II): 24x + 12(1/480) = 1/8 ⇒ 24x + 1/40 = 1/8 ⇒ 24x = 1/8 − 1/40 = 1/10 ⇒ x = 1/240. Now, (20 men + 8 women)’s 1 day’s work = 20/240 + 8/480 = 1/12 + 1/60 = 1/10. Hence, time taken = 1 ÷ (1/10) = 10 days. Incorrect Answer: (c) Explanation: Let 1 man’s 1 day’s work = x and 1 woman’s 1 day’s work = y. Then, 12x + 24y = 1/10 …(I) 24x + 12y = 1/8 …(II) Multiply (I) by 2: 24x + 48y = 1/5. Subtract (II): (24x + 48y) − (24x + 12y) = 1/5 − 1/8 ⇒ 36y = (8−5)/40 = 3/40 ⇒ y = (3/40)/36 = 1/480. Put y in (II): 24x + 12(1/480) = 1/8 ⇒ 24x + 1/40 = 1/8 ⇒ 24x = 1/8 − 1/40 = 1/10 ⇒ x = 1/240. Now, (20 men + 8 women)’s 1 day’s work = 20/240 + 8/480 = 1/12 + 1/60 = 1/10. Hence, time taken = 1 ÷ (1/10) = 10 days.

#### 3. Question

12 men and 24 women can finish a work in 10 days. The same work can be finished by 24 men and 12 women in 8 days. How long will 20 men and 8 women take?

• (a) 8 days

• (b) 9 days

• (c) 10 days

• (d) 12 days

Answer: (c) Explanation: Let 1 man’s 1 day’s work = x and 1 woman’s 1 day’s work = y. Then, 12x + 24y = 1/10 …(I) 24x + 12y = 1/8 …(II) Multiply (I) by 2: 24x + 48y = 1/5. Subtract (II): (24x + 48y) − (24x + 12y) = 1/5 − 1/8 ⇒ 36y = (8−5)/40 = 3/40 ⇒ y = (3/40)/36 = 1/480. Put y in (II): 24x + 12(1/480) = 1/8 ⇒ 24x + 1/40 = 1/8 ⇒ 24x = 1/8 − 1/40 = 1/10 ⇒ x = 1/240. Now, (20 men + 8 women)’s 1 day’s work = 20/240 + 8/480 = 1/12 + 1/60 = 1/10. Hence, time taken = 1 ÷ (1/10) = 10 days.

• Question 4 of 5 4. Question A warehouse build needs 14 persons working 10 hours to complete. If 7 persons begin at 6:00 am, then the team increases to 14 persons from 10:00 am, to 20 persons from 1:00 pm, and finally to 30 persons from 3:00 pm, at what time will the work be completed? (a) 3:00 pm (b) 4:00 pm (c) 4:30 pm (d) 5:00 pm Correct Answer: (b) Explanation: Total work = 14 × 10 = 140 man-hours. 6–10 am: 7 × 4 h = 28 man-hours. 10 am–1 pm: 14 × 3 h = 42 man-hours. 1–3 pm: 20 × 2 h = 40 man-hours. Subtotal by 3 pm = 28 + 42 + 40 = 110 man-hours. Remaining = 140 − 110 = 30 man-hours. From 3–4 pm: 30 persons × 1 h = 30 man-hours. So, work finishes exactly at 4:00 pm. Hence, Option (b). Incorrect Answer: (b) Explanation: Total work = 14 × 10 = 140 man-hours. 6–10 am: 7 × 4 h = 28 man-hours. 10 am–1 pm: 14 × 3 h = 42 man-hours. 1–3 pm: 20 × 2 h = 40 man-hours. Subtotal by 3 pm = 28 + 42 + 40 = 110 man-hours. Remaining = 140 − 110 = 30 man-hours. From 3–4 pm: 30 persons × 1 h = 30 man-hours. So, work finishes exactly at 4:00 pm. Hence, Option (b).

#### 4. Question

A warehouse build needs 14 persons working 10 hours to complete. If 7 persons begin at 6:00 am, then the team increases to 14 persons from 10:00 am, to 20 persons from 1:00 pm, and finally to 30 persons from 3:00 pm, at what time will the work be completed?

• (a) 3:00 pm

• (b) 4:00 pm

• (c) 4:30 pm

• (d) 5:00 pm

Answer: (b) Explanation: Total work = 14 × 10 = 140 man-hours. 6–10 am: 7 × 4 h = 28 man-hours. 10 am–1 pm: 14 × 3 h = 42 man-hours. 1–3 pm: 20 × 2 h = 40 man-hours. Subtotal by 3 pm = 28 + 42 + 40 = 110 man-hours. Remaining = 140 − 110 = 30 man-hours. From 3–4 pm: 30 persons × 1 h = 30 man-hours. So, work finishes exactly at 4:00 pm. Hence, Option (b).

• Question 5 of 5 5. Question A data migration runs for x days. After that, logs are processed for x hours and dashboards are built for 12x minutes. What is the total time in hours? (a) 126x/5 (b) 120x/5 (c) 63x/5 (d) 252x/10 Correct Answer: (a) Explanation: Migration = x days = 24x hours Log processing = x hours Dashboards = 12x minutes = hours Total = hours. Incorrect Answer: (a) Explanation: Migration = x days = 24x hours Log processing = x hours Dashboards = 12x minutes = hours Total = hours.

#### 5. Question

A data migration runs for x days. After that, logs are processed for x hours and dashboards are built for 12x minutes. What is the total time in hours?

• (a) 126x/5

• (b) 120x/5

• (d) 252x/10

Answer: (a) Explanation: Migration = x days = 24x hours Log processing = x hours Dashboards = 12x minutes = hours Total = hours.

• Official Facebook Page HERE

• Follow our Twitter Account HERE