60% of a number is 30 less than 75% of the same number. The number is: MCQ with Answer and Explanation

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60% of a number is 30 less than 75% of the same number. The number is:

A. 240

B. 180

C. 200

D. 150

Answer: Option C

Solution (By JKSSB Mock Tests)

0.75x - 0.6x = 30 → 0.15x = 30 → x = 200.

This question belongs to: Maths Percentage

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Question #1

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

A. 210

B. 200

C. 190

D. 180

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Correct Answer: Option B

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

This question belongs to: Maths Percentage

Question #2

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A man's salary is increased by 12% and then decreased by 12%. Find the net change in his salary.

A. 2.4% decrease

B. 1.44% increase

C. No change

D. 1.44% decrease

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Correct Answer: Option D

Explanation:
1.12 × 0.88 = 0.9856, decrease 1.44%.

This question belongs to: Maths Percentage

Question #3

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The population of a town increases by 5% from 20,000. New population is:

A. 22,000

B. 21,500

C. 21,000

D. 20,500

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Correct Answer: Option C

Explanation:
20,000 × 1.05 = 21,000.

This question belongs to: Maths Percentage

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