The price of an article is increased by 25% and then decreased by x%. If the net effect is no change, find x. MCQ with Answer and Explanation

The price of an article is increased by 25% and then decreased by x%. If the net effect is no change, find x.

A. 22.5

B. 25

C. 20

D. 30

Answer: Option C

1.25 × (1 - x/100) = 1 → 1 - x/100 = 0.8 → x/100 = 0.2 → x=20.

This question belongs to: Maths Percentage

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Question #1 Report Error

A number is increased by 20% and then decreased by 15%. The resulting number is 204. Find the original number.

A. 190

B. 210

C. 200

D. 180

Correct Answer: Option C

Explanation:
1.2 × 0.85 = 1.02, 1.02x = 204 → x = 200.

This question belongs to: Maths Percentage

Question #2 Report Error

If 20% of a number is 45, what is the number?

A. 200

B. 250

C. 300

D. 225

Correct Answer: Option D

Explanation:
Let the number be x. (20 / 100) * x = 45 implies x = 45 * 5 = 225.

This question belongs to: Maths Percentage

Question #3 Report Error

A man covers a distance at a speed of 60 kmph and returns back at a speed of 40 kmph. What is his average speed for the whole journey?

A. 50 kmph

B. 48 kmph

C. 52 kmph

D. 55 kmph

Correct Answer: Option B

Explanation:
Average speed = 2×60×40/(60+40) = 4800/100 = 48 kmph. (Note: Not percentage but included as tough TSD).

This question belongs to: Maths Percentage