A number increased by 15% is 138. The number is: MCQ with Answer and Explanation

A number increased by 15% is 138. The number is:

A. 110

B. 125

C. 120

D. 115

Answer: Option C

1.15x = 138 → x = 120.

This question belongs to: Maths Percentage

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Question #1 Report Error

Cost article Rs. 500, marked up 60%, then 25% discount. Selling price:

A. 600

B. 625

C. 575

D. 550

Correct Answer: Option A

Explanation:
Marked = 500×1.6 = 800, SP = 800×0.75 = 600.

This question belongs to: Maths Percentage

Question #2 Report Error

Number increased by 30%. By what % should new number be decreased to get original?

A. 23.08%

B. 25%

C. 27.27%

D. 20%

Correct Answer: Option A

Explanation:
Original 100, new 130. Decrease % = (30/130)×100 ≈ 23.08%.

This question belongs to: Maths Percentage

Question #3 Report Error

If the length of a rectangle is increased by 20%, by what percentage must the width be decreased to maintain the same area?

A. 25%

B. 16.67%

C. 30%

D. 20%

Correct Answer: Option B

Explanation:
Required decrease = (20 / 120) * 100 = 16.67%.

This question belongs to: Maths Percentage