Practice mode Problems on Numbers

A student was asked to divide a number by 7 but multiplied it by 7 instead, and his answer exceeded the correct one by 384. What was the number?

Correct answer C. 56

Explanation

Let the number be x. Then 7x - x/7 = 48x/7 = 384, so x = 384 x 7/48 = 56.

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