40% of a number is 60. 80% of that number is: MCQ with Answer and Explanation

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40% of a number is 60. 80% of that number is:

A. 100

B. 130

C. 120

D. 110

Answer: Option C

Solution (By JKSSB Mock Tests)

Number = 60/0.4 = 150, 80% of 150 = 120.

This question belongs to: Maths Percentage

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Question #1

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A man spends 70% of his salary and saves Rs. 6000. His salary is:

A. 15000

B. 20000

C. 22000

D. 18000

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Correct Answer: Option B

Explanation:
Savings = 30% = 6000 → salary = 6000/0.3 = 20000.

This question belongs to: Maths Percentage

Question #2

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A can do a piece of work in 20 days. B is 25% more efficient than A. How many days will B alone take to do the work?

A. 18 days

B. 15 days

C. 16 days

D. 14 days

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Correct Answer: Option C

Explanation:
Efficiency ratio A:B = 100:125 = 4:5. Time ratio = 5:4. B's time = (4/5)×20 = 16 days.

This question belongs to: Maths Percentage

Question #3

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Wage decreased 25% then increased 25%. Loss %:

A. 6.25%

B. 5%

C. 0%

D. 7.5%

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Correct Answer: Option A

Explanation:
0.75×1.25 = 0.9375, loss 6.25%.

This question belongs to: Maths Percentage

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