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

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

A. 30

B. 20

C. 22.5

D. 25

Answer: Option B

Solution (By JKSSB Mock Tests)

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

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A man spends 25% on rent, 20% of remainder on food, 15% of remainder on education, saves Rs. 15300. Income:

A. 30000

B. 28000

C. 25000

D. 32000

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Correct Answer: Option A

Explanation:
Rent 0.25I, left 0.75I. Food 0.15I, left 0.6I. Education 0.09I, left 0.51I = 15300 → I=30000.

This question belongs to: Maths Percentage

Question #2

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If 25% of a number added to 50 gives the number. The number is:

A. 66.67

B. 70

C. 65

D. 60

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Correct Answer: Option A

Explanation:
0.25x + 50 = x → 0.75x = 50 → x = 66.67.

This question belongs to: Maths Percentage

Question #3

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60 L mixture, milk:water 2:1. To make 1:2, water added:

A. 65 L

B. 60 L

C. 55 L

D. 50 L

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Correct Answer: Option B

Explanation:
Milk=40 L, water=20 L. For 1:2, water=80 L, add 60 L.

This question belongs to: Maths Percentage

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