Difference between a number and its 2/5 is 510. 10% of that number: MCQ with Answer and Explanation

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Difference between a number and its 2/5 is 510. 10% of that number:

A. 90

B. 80

C. 95

D. 85

Answer: Option D

Solution (By JKSSB Mock Tests)

x - 0.4x = 0.6x = 510 → x = 850, 10% = 85.

This question belongs to: Maths Percentage

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Practice More Percentage Questions

Question #1

A's marks 25% more than B's, B's 20% less than C's. A gets 200, C's marks:

A. 200

B. 180

C. 190

D. 210

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Correct Answer: Option A

Explanation:
A=1.25B, B=0.8C → A=1.25×0.8C = C, so C=200.

This question belongs to: Maths Percentage

Question #2

Two numbers are 20% and 30% more than a third. Ratio of the two numbers:

A. 10:11

B. 11:12

C. 12:13

D. 13:14

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Correct Answer: Option C

Explanation:
Third=100, first=120, second=130, ratio 120:130 = 12:13.

This question belongs to: Maths Percentage

Question #3

12% of a number is 96. The number is:

A. 800

B. 900

C. 700

D. 600

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Correct Answer: Option A

Explanation:
0.12x = 96 → x = 800.

This question belongs to: Maths Percentage

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