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Don't let you its appearances fool you

Number Theory Level 1

\(n^{2}\) + n + 41 is prime for every natural number n.

Is this statement true, or false?

True False

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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 7 million people

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including olympiad champions, researchers, and professionals.

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by Santiago Arce

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