The difference between 60% of a number and 40% of the same number is 100. What is 30% of that number? MCQ with Answer and Explanation

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The difference between 60% of a number and 40% of the same number is 100. What is 30% of that number?

A. 120

B. 150

C. 140

D. 160

Answer: Option B

Solution (By JKSSB Mock Tests)

0.6x - 0.4x = 0.2x = 100 → x = 500, 30% = 150.

This question belongs to: Maths Percentage

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Practice More Percentage Questions

Question #1

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

A. 50

B. 45

C. 48

D. 52

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Correct Answer: Option A

Explanation:
1.1x = 55 → x = 50.

This question belongs to: Maths Percentage

Question #2

A's salary is 50% of B's salary which is 40% of C's salary. What percent of C's salary is A's salary?

A. 30%

B. 15%

C. 25%

D. 20%

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Correct Answer: Option D

Explanation:
A = 0.5B, B = 0.4C → A = 0.5×0.4C = 0.2C = 20% of C.

This question belongs to: Maths Percentage

Question #3

If x is 50% of y, what percentage of x is y?

A. 250%

B. 150%

C. 200%

D. 100%

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Correct Answer: Option C

Explanation:
x = 0.5y. Therefore, y = x / 0.5 = 2x. Thus, y is 200% of x.

This question belongs to: Maths Percentage

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