A number increased by 30% then decreased by 30% gives 273. Original number: MCQ with Answer and Explanation

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

A. 310

B. 290

C. 300

D. 280

Answer: Option C

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

This question belongs to: Maths Percentage

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Question #1 Report Error

A man's salary increased by 33.33% and then decreased by 25%. His net change in salary is:

A. No change

B. 5% increase

C. 5% decrease

D. 10% decrease

Correct Answer: Option A

Explanation:
33.33% = 1/3. Multiplier = (4/3)×(3/4)=1, no change.

This question belongs to: Maths Percentage

Question #2 Report Error

Salary increased by 15% then decreased by 15%. Net effect:

A. 2.25% decrease

B. 1.5% decrease

C. No change

D. 2.25% increase

Correct Answer: Option A

Explanation:
1.15 × 0.85 = 0.9775, 2.25% decrease.

This question belongs to: Maths Percentage

Question #3 Report Error

Employees reduced by 25%. To keep total wage bill same, wage per head must increase by:

A. 30%

B. 20%

C. 25%

D. 33.33%

Correct Answer: Option D

Explanation:
New employees 0.75, wage per head multiplier = 1/0.75 = 1.3333, increase 33.33%.

This question belongs to: Maths Percentage