A number decreased by 15% becomes 170. Original number is: MCQ with Answer and Explanation

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A number decreased by 15% becomes 170. Original number is:

A. 200

B. 205

C. 190

D. 195

Answer: Option A

Solution (By JKSSB Mock Tests)

0.85x = 170 → x = 200.

This question belongs to: Maths Percentage

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Question #1

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Length +25%, breadth -20%. Change in area:

A. 5% decrease

B. 5% increase

C. 0%

D. 10% increase

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Correct Answer: Option C

Explanation:
1.25×0.8 = 1, 0% change.

This question belongs to: Maths Percentage

Question #2

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130% of 130 is:

A. 149

B. 159

C. 169

D. 179

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Correct Answer: Option C

Explanation:
1.3 × 130 = 169.

This question belongs to: Maths Percentage

Question #3

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Student A gets 30% marks and fails by 15 marks. Student B gets 40% marks and gets 15 marks more than passing. What is the total marks?

A. 350

B. 250

C. 300

D. 400

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Correct Answer: Option C

Explanation:
Difference in percentage = 40% - 30% = 10%. Difference in marks = 15 - (-15) = 30. 10% of Maximum = 30. Maximum = 300.

This question belongs to: Maths Percentage

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