A number increased by 18% then decreased by 18% gives net: MCQ with Answer and Explanation

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A number increased by 18% then decreased by 18% gives net:

A. 2% decrease

B. 0%

C. 3.24% decrease

D. 3.24% increase

Answer: Option C

Solution (By JKSSB Mock Tests)

1.18 × 0.82 = 0.9676, 3.24% decrease.

This question belongs to: Maths Percentage

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Question #1

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Value of a scooter depreciates 8% per year. Price 50,000, after 1 year value is:

A. 47,000

B. 48,000

C. 46,000

D. 45,000

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Correct Answer: Option C

Explanation:
Value = 50,000 × 0.92 = 46,000.

This question belongs to: Maths Percentage

Question #2

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A man spends 40% of his income on food, 25% on rent, 15% on education and saves the rest. If his savings are Rs. 4500, find his income.

A. Rs. 27500

B. Rs. 20000

C. Rs. 22500

D. Rs. 25000

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Correct Answer: Option C

Explanation:
Spend % = 40+25+15 = 80%, save 20% = 4500, income = 4500/0.2 = 22500.

This question belongs to: Maths Percentage

Question #3

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A number is decreased by 10% and then the new number is increased by 20%. If the resulting number is 540, find the original number.

A. 500

B. 480

C. 450

D. 520

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Correct Answer: Option A

Explanation:
0.9 × 1.2 = 1.08, 1.08x = 540 → x = 500.

This question belongs to: Maths Percentage

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