Basic Maths and Reasoning MCQs (page 122 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 2421–2440.
- 2421.
12 workers can finish a job in 8 days. How many days will 4 workers take?
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Answer: D. 24 days
Total work = 12 × 8 = 96 worker-days. 96 ÷ 4 = 24 days.
- 2422.
4 workers can finish a job in 10 days. How many days will 10 workers take?
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Answer: C. 4 days
Total work = 4 × 10 = 40 worker-days. 40 ÷ 10 = 4 days.
- 2423.
10 workers can finish a job in 6 days. How many days will 4 workers take?
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Answer: C. 15 days
Total work = 10 × 6 = 60 worker-days. 60 ÷ 4 = 15 days.
- 2424.
30 workers can finish a job in 10 days. How many days will 3 workers take?
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Answer: C. 100 days
Total work = 30 × 10 = 300 worker-days. 300 ÷ 3 = 100 days.
- 2425.
20 workers can finish a job in 18 days. How many days will 2 workers take?
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Answer: D. 180 days
Total work = 20 × 18 = 360 worker-days. 360 ÷ 2 = 180 days.
- 2426.
8 workers can finish a job in 10 days. How many days will 40 workers take?
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Answer: A. 2 days
Total work = 8 × 10 = 80 worker-days. 80 ÷ 40 = 2 days.
- 2427.
8 workers can finish a job in 12 days. How many days will 6 workers take?
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Answer: D. 16 days
Total work = 8 × 12 = 96 worker-days. 96 ÷ 6 = 16 days.
- 2428.
16 workers can finish a job in 8 days. How many days will 8 workers take?
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Answer: C. 16 days
Total work = 16 × 8 = 128 worker-days. 128 ÷ 8 = 16 days.
- 2429.
12 workers can finish a job in 5 days. How many days will 2 workers take?
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Answer: C. 30 days
Total work = 12 × 5 = 60 worker-days. 60 ÷ 2 = 30 days.
- 2430.
20 workers can finish a job in 8 days. How many days will 40 workers take?
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Answer: B. 4 days
Total work = 20 × 8 = 160 worker-days. 160 ÷ 40 = 4 days.
- 2431.
20 workers can finish a job in 8 days. How many days will 10 workers take?
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Answer: C. 16 days
Total work = 20 × 8 = 160 worker-days. 160 ÷ 10 = 16 days.
- 2432.
8 workers can finish a job in 10 days. How many days will 20 workers take?
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Answer: B. 4 days
Total work = 8 × 10 = 80 worker-days. 80 ÷ 20 = 4 days.
- 2433.
16 workers can finish a job in 12 days. How many days will 2 workers take?
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Answer: C. 96 days
Total work = 16 × 12 = 192 worker-days. 192 ÷ 2 = 96 days.
- 2434.
20 workers can finish a job in 10 days. How many days will 2 workers take?
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Answer: B. 100 days
Total work = 20 × 10 = 200 worker-days. 200 ÷ 2 = 100 days.
- 2435.
What is the area of a rectangle 58 m long and 21 m wide?
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Answer: D. 1,218 m²
Area = length × width = 58 × 21 = 1,218 m².
- 2436.
What is the perimeter of a rectangle 14 cm long and 19 cm wide?
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Answer: B. 66 cm
Perimeter = 2 × (length + width) = 2 × (14 + 19) = 66 cm.
- 2437.
What is the perimeter of a rectangle 4 cm long and 37 cm wide?
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Answer: B. 82 cm
Perimeter = 2 × (length + width) = 2 × (4 + 37) = 82 cm.
- 2438.
What is the perimeter of a rectangle 51 cm long and 33 cm wide?
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Answer: B. 168 cm
Perimeter = 2 × (length + width) = 2 × (51 + 33) = 168 cm.
- 2439.
What is the area of a rectangle 8 m long and 28 m wide?
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Answer: C. 224 m²
Area = length × width = 8 × 28 = 224 m².
- 2440.
What is the area of a rectangle 13 m long and 38 m wide?
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Answer: C. 494 m²
Area = length × width = 13 × 38 = 494 m².