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## Main Question or Discussion Point

What are the most interesting examples of unsolved problems in number theory which an 18 year can understand?

- Thread starter matqkks
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What are the most interesting examples of unsolved problems in number theory which an 18 year can understand?

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Easy to state, fiendishly difficult to prove.

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"Unsolved problems in number theory", R.K.Gay, Springer Edit.

Much of them are easy to understand.

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