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03-03-2016
Mathematics

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Mark worked on math homework less than 1/3 the amount of time that his brother did. If Mark spent 25 minutes on his math homework, how much time did his brother spend on his math homework?

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SmarticalParticals SmarticalParticals

03-03-2016

25 < 1/3x
25 ÷ 1/3 < x
25 × 3/1 < x
75 < x

Since x is greater than 75, Marks brother spent greater than 75 minutes studying.

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