examples, and problems from the community.

including olympiad champions, researchers, and professionals.

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

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examples, and problems from the community.

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by **Brilliant Staff**

Evaluate \[\left(-\frac{19}{3}\right) \times \left(-\frac{15}{19}\right).\]

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Divide \( 80 \) by \( \frac{1}{4} \) and then add \( 30\). What is the result?

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Evaluate \[ 1\frac{5}{7} \div 1\frac{1}{5}. \]

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by **Brilliant Staff**

Evaluate \[ 3\frac{1}{2} \times 4. \]

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by **Brilliant Staff**

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