A number increased by 10% gives 55. The number is: MCQ with Answer and Explanation

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A number increased by 10% gives 55. The number is:

A. 45

B. 50

C. 52

D. 48

Answer: Option B

Solution (By JKSSB Mock Tests)

1.1x = 55 → x = 50.

This question belongs to: Maths Percentage

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Question #1

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Price increased 15% then decreased 10%. Net change:

A. 3.5% increase

B. 5.5% increase

C. 4.5% increase

D. 5% increase

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Correct Answer: Option A

Explanation:
1.15×0.9 = 1.035, increase 3.5%.

This question belongs to: Maths Percentage

Question #2

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If the compound interest on a sum for 2 years at 10% per annum is Rs. 525, find the sum.

A. Rs. 2500

B. Rs. 2000

C. Rs. 2400

D. Rs. 2200

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Correct Answer: Option A

Explanation:
CI = P[(1.1)² - 1] = 0.21P = 525 → P = 2500.

This question belongs to: Maths Percentage

Question #3

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A man sells an article at 10% profit. If bought at 10% less and sold for Rs. 10 more, gain 25%. CP:

A. Rs. 300

B. Rs. 350

C. Rs. 400

D. Rs. 450

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Correct Answer: Option C

Explanation:
CP=x, SP=1.1x. New CP=0.9x, new SP=1.1x+10, new SP=1.25×0.9x=1.125x. So 1.1x+10=1.125x → 0.025x=10 → x=400.

This question belongs to: Maths Percentage

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