If 15 men can complete a work in 20 days, how many men are required to complete the work in 10 days? MCQ with Answer and Explanation

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If 15 men can complete a work in 20 days, how many men are required to complete the work in 10 days?

A. 32

B. 30

C. 25

D. 28

Answer: Option B

Solution (By JKSSB Mock Tests)

M1×D1 = M2×D2 → 15×20 = M2×10 → M2 = 30.

This question belongs to: Maths Percentage

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Question #1

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A number is 50% more than another number. If the smaller number is 60, what is 40% of the larger number?

A. 40

B. 30

C. 36

D. 45

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Correct Answer: Option C

Explanation:
Larger = 60 × 1.5 = 90, 40% of 90 = 36.

This question belongs to: Maths Percentage

Question #2

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A number increased by 30% then decreased by 30% gives 273. Original number:

A. 300

B. 280

C. 290

D. 310

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Correct Answer: Option A

Explanation:
x × 1.3 × 0.7 = 0.91x = 273 → x = 300.

This question belongs to: Maths Percentage

Question #3

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Difference between 45% and 18% of a number is 1458. Number:

A. 5200

B. 5600

C. 5400

D. 5000

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Correct Answer: Option C

Explanation:
27% of x = 1458 → x = 1458/0.27 = 5400.

This question belongs to: Maths Percentage

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