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Practice mode Problems on Numbers

One-fifth of a number exceeds one-seventh of the same number by 8. What is the number?

Correct answer B. 140

Explanation

Let the number be x. Then x/5 - x/7 = (7x - 5x)/35 = 2x/35 = 8, so x = 8 x 35/2 = 140.

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