The value of a machine is 10,000. It depreciates by 10% annually. What will be its value after 2 years? MCQ with Answer and Explanation

The value of a machine is 10,000. It depreciates by 10% annually. What will be its value after 2 years?

A. 8200

B. 8000

C. 8100

D. 9000

Answer: Option C

Value = P * (1 - R/100)^t = 10000 * (0.90)^2 = 10000 * 0.81 = 8100.

This question belongs to: Maths Percentage

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Question #1 Report Error

A number is increased by 10%, then increased by 25%, then decreased by 10%. Net percentage change:

A. 23.75% increase

B. 22.5% increase

C. 20% increase

D. 25% increase

Correct Answer: Option A

Explanation:
1.1 × 1.25 × 0.9 = 1.2375, increase 23.75%.

This question belongs to: Maths Percentage

Question #2 Report Error

If 20% of a number is added to another number, the second number increases by 50%. What is the ratio of the first number to the second number?

A. 5:2

B. 2:5

C. 1:2

D. 2:1

Correct Answer: Option A

Explanation:
Let first = x, second = y. 0.2x + y = 1.5y → 0.2x = 0.5y → x/y = 0.5/0.2 = 5/2. Ratio = 5:2.

This question belongs to: Maths Percentage

Question #3 Report Error

Price reduced 25%, enables buying 3 kg more for Rs. 90. Reduced price/kg:

A. Rs. 7

B. Rs. 7.5

C. Rs. 6

D. Rs. 8

Correct Answer: Option B

Explanation:
Original price x, xy=90. New 0.75x(y+3)=90 → 0.75×90 + 2.25x=90 → x=10, reduced 7.5.

This question belongs to: Maths Percentage