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This question got some attention these past few days

Number Theory Level 1

For what integer \(n\), is \(n!\) equal to the number of seconds in 6 weeks?

Try to solve this without using a calculator.

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Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 6 million people

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including olympiad champions, researchers, and professionals.

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by Chung Kevin

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