The major criteria is that we need enough information based on peoples attempts.

E.g. if you say that it is a level 3 problem, but only level 1's have attempted it and are unable to solve it, then we would need quite a lot more of them to fail to solve it, before we can become more certain that it is indeed level 3. If instead, only 50% of level 3's can solve it, then that would make us pretty certain that it should be at level 3.

So, there is no hard and fast rule on the number of views / attempts / shares / likes.

okay. but what if no one is able to solve the problem ??? then obviously they won't be able to attempt it and if they dont attempt then it means the problem remains unrated!!!

So this implies one should not post too hard questions ?? @Calvin Lin

If no one solves the problem then the rating will keep on rising. As we get confirmation that most/all of the level 5's can't solve it, we can release the rating at the higher end of level 5.

The same applies for a problem that everyone can solve and the rating keeps on dropping.

Here's an overview of how the 'rated-unrated' system works. Say you posted a problem and set its level to three. If enough people attempt it, it will eventually get rated. If people keep getting it wrong, the level shown would be higher than the level you originally gave. If a lot of lower rated users keep getting it right, the level shown would be lower than the level you originally gave.

suppose i posted a difficult question and got enough views.. but no one is able to solve it. so they must not attempt the question .. Then this will also leads to unrated problem.. I think this should not be happened.
so what can be done in that case ??

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`*italics*`

or`_italics_`

italics`**bold**`

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`[example link](https://brilliant.org)`

`> This is a quote`

Remember to wrap math in $</span> ... <span>$ or $</span> ... <span>$ to ensure proper formatting.`2 \times 3`

`2^{34}`

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TopNewestThe major criteria is that we need enough information based on peoples attempts.

E.g. if you say that it is a level 3 problem, but only level 1's have attempted it and are unable to solve it, then we would need quite a lot more of them to fail to solve it, before we can become more certain that it is indeed level 3. If instead, only 50% of level 3's can solve it, then that would make us pretty certain that it should be at level 3.

So, there is no hard and fast rule on the number of views / attempts / shares / likes.

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okay. but what if no one is able to solve the problem ??? then obviously they won't be able to attempt it and if they dont attempt then it means the problem remains unrated!!!

So this implies one should not post too hard questions ?? @Calvin Lin

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If no one solves the problem then the rating will keep on rising. As we get confirmation that most/all of the level 5's can't solve it, we can release the rating at the higher end of level 5.

The same applies for a problem that everyone can solve and the rating keeps on dropping.

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Now , I'm happy !

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Number of attempts.

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whats the minimum number of attempts required ?

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That I don't know.

Here's an overview of how the 'rated-unrated' system works. Say you posted a problem and set its level to three. If enough people attempt it, it will eventually get rated. If people keep getting it wrong, the level shown would be higher than the level you originally gave. If a lot of lower rated users keep getting it right, the level shown would be lower than the level you originally gave.

Hope this helps.

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suppose i posted a difficult question and got enough views.. but no one is able to solve it. so they must not attempt the question .. Then this will also leads to unrated problem.. I think this should not be happened. so what can be done in that case ??

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