15% of 40 greater than 25% of a number by 2. The number: MCQ with Answer and Explanation

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15% of 40 greater than 25% of a number by 2. The number:

A. 18

B. 14

C. 16

D. 12

Answer: Option C

Solution (By JKSSB Mock Tests)

6 = 0.25x + 2 → 0.25x = 4 → x = 16.

This question belongs to: Maths Percentage

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Question #1

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A man's income Rs. 15000. Spends 40% food, 20% rent, 15% education, 10% others. By what % reduce food expenditure to increase savings by 25%?

A. 9.375%

B. 10%

C. 8.5%

D. 12.5%

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Correct Answer: Option A

Explanation:
Present savings 15% = 2250, food=6000. New savings 2812.5, increase 562.5 from food reduction. % reduction = (562.5/6000)×100 = 9.375%.

This question belongs to: Maths Percentage

Question #2

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A man covers a distance at a speed of 60 kmph and returns back at a speed of 40 kmph. What is his average speed for the whole journey?

A. 55 kmph

B. 52 kmph

C. 48 kmph

D. 50 kmph

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Correct Answer: Option C

Explanation:
Average speed = 2×60×40/(60+40) = 4800/100 = 48 kmph. (Note: Not percentage but included as tough TSD).

This question belongs to: Maths Percentage

Question #3

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A student multiplied a number by 3/4 instead of 4/3. What is the percentage error?

A. 50%

B. 40%

C. 45%

D. 43.75%

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Correct Answer: Option D

Explanation:
True = 4/3x. False = 3/4x. Error = (4/3 - 3/4)x = (7/12)x. % Error = ((7/12) / (4/3)) * 100 = (21/48) * 100 = 43.75%.

This question belongs to: Maths Percentage

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