A student was asked to find 5/8 of a number but found 5/6 of it instead, getting an answer 25 more than the correct one. What was the number?
Correct answer A. 120
Explanation
Let the number be x. The excess is 5x/6 - 5x/8 = (20x - 15x)/24 = 5x/24 = 25, so x = 120.
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