If 18% of x is 90, then x = ? MCQ with Answer and Explanation

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If 18% of x is 90, then x = ?

A. 550

B. 500

C. 450

D. 400

Answer: Option B

Solution (By JKSSB Mock Tests)

0.18x = 90 → x = 500.

This question belongs to: Maths Percentage

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Question #1

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A man buys a cycle for Rs. 1400 and sells it at a loss of 15%. What is the selling price?

A. Rs. 1150

B. Rs. 1210

C. Rs. 1180

D. Rs. 1190

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Correct Answer: Option D

Explanation:
SP = 1400 × 0.85 = 1190.

This question belongs to: Maths Percentage

Question #2

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In a town, 70% of people speak English, 65% speak Hindi, and 27% speak neither. What percentage of people speak both languages?

A. 62%

B. 60%

C. 52%

D. 70%

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Correct Answer: Option A

Explanation:
Speak at least one = 100% - 27% = 73%. n(E U H) = n(E) + n(H) - n(E ∩ H). 73 = 70 + 65 - n(E ∩ H). n(E ∩ H) = 135 - 73 = 62%.

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Question #3

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The population of a town increases by 15% in the first year and decreases by 10% in the second year. If the population at the end of second year is 10350, what was the population at the beginning?

A. 10500

B. 9000

C. 10000

D. 9500

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Correct Answer: Option C

Explanation:
Net multiplier = 1.15 × 0.9 = 1.035. Population = 10350/1.035 = 10000.

This question belongs to: Maths Percentage

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