Basic Maths and Reasoning MCQs (page 121 of 212)
Percentages, ratios, averages, profit and loss, speed and time, number series and simple logical reasoning, with the working shown for every answer.
4,221 questions. Select an option to check your answer, or open "Show answer". Showing 2401–2420.
- 2401.
12 workers can finish a job in 15 days. How many days will 30 workers take?
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Answer: A. 6 days
Total work = 12 × 15 = 180 worker-days. 180 ÷ 30 = 6 days.
- 2402.
16 workers can finish a job in 18 days. How many days will 2 workers take?
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Answer: C. 144 days
Total work = 16 × 18 = 288 worker-days. 288 ÷ 2 = 144 days.
- 2403.
12 workers can finish a job in 10 days. How many days will 8 workers take?
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Answer: C. 15 days
Total work = 12 × 10 = 120 worker-days. 120 ÷ 8 = 15 days.
- 2404.
5 workers can finish a job in 18 days. How many days will 2 workers take?
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Answer: D. 45 days
Total work = 5 × 18 = 90 worker-days. 90 ÷ 2 = 45 days.
- 2405.
20 workers can finish a job in 5 days. How many days will 2 workers take?
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Answer: C. 50 days
Total work = 20 × 5 = 100 worker-days. 100 ÷ 2 = 50 days.
- 2406.
8 workers can finish a job in 12 days. How many days will 4 workers take?
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Answer: B. 24 days
Total work = 8 × 12 = 96 worker-days. 96 ÷ 4 = 24 days.
- 2407.
8 workers can finish a job in 24 days. How many days will 3 workers take?
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Answer: B. 64 days
Total work = 8 × 24 = 192 worker-days. 192 ÷ 3 = 64 days.
- 2408.
12 workers can finish a job in 20 days. How many days will 24 workers take?
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Answer: B. 10 days
Total work = 12 × 20 = 240 worker-days. 240 ÷ 24 = 10 days.
- 2409.
24 workers can finish a job in 9 days. How many days will 4 workers take?
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Answer: C. 54 days
Total work = 24 × 9 = 216 worker-days. 216 ÷ 4 = 54 days.
- 2410.
16 workers can finish a job in 8 days. How many days will 4 workers take?
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Answer: C. 32 days
Total work = 16 × 8 = 128 worker-days. 128 ÷ 4 = 32 days.
- 2411.
30 workers can finish a job in 12 days. How many days will 45 workers take?
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Answer: A. 8 days
Total work = 30 × 12 = 360 worker-days. 360 ÷ 45 = 8 days.
- 2412.
20 workers can finish a job in 15 days. How many days will 4 workers take?
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Answer: C. 75 days
Total work = 20 × 15 = 300 worker-days. 300 ÷ 4 = 75 days.
- 2413.
4 workers can finish a job in 6 days. How many days will 8 workers take?
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Answer: A. 3 days
Total work = 4 × 6 = 24 worker-days. 24 ÷ 8 = 3 days.
- 2414.
30 workers can finish a job in 12 days. How many days will 4 workers take?
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Answer: B. 90 days
Total work = 30 × 12 = 360 worker-days. 360 ÷ 4 = 90 days.
- 2415.
20 workers can finish a job in 9 days. How many days will 30 workers take?
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Answer: A. 6 days
Total work = 20 × 9 = 180 worker-days. 180 ÷ 30 = 6 days.
- 2416.
15 workers can finish a job in 10 days. How many days will 3 workers take?
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Answer: C. 50 days
Total work = 15 × 10 = 150 worker-days. 150 ÷ 3 = 50 days.
- 2417.
15 workers can finish a job in 6 days. How many days will 30 workers take?
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Answer: B. 3 days
Total work = 15 × 6 = 90 worker-days. 90 ÷ 30 = 3 days.
- 2418.
15 workers can finish a job in 9 days. How many days will 5 workers take?
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Answer: C. 27 days
Total work = 15 × 9 = 135 worker-days. 135 ÷ 5 = 27 days.
- 2419.
12 workers can finish a job in 5 days. How many days will 6 workers take?
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Answer: C. 10 days
Total work = 12 × 5 = 60 worker-days. 60 ÷ 6 = 10 days.
- 2420.
18 workers can finish a job in 5 days. How many days will 15 workers take?
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Answer: B. 6 days
Total work = 18 × 5 = 90 worker-days. 90 ÷ 15 = 6 days.