Percentage Practice Test 5 with solutions

Question : 21 of 40

Marks: +1, -0

The difference of 40% of a positive number and 20% of the same number is 125. What is the square root of that number?

Solution:

Let the number be x.
Then, 40% of x - 20% of x = 125

40/100x-20/100x=125

20x = 12,500

x = 625
∴ Square root of the number = 25

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