Levels fluctuating randomly?

How does the Brilliant leveling algorithm work? I was at level 5 Geo/Combinatorics a while ago, stopped doing problems, and noticed I was at level 4 earlier today. Now, I'm back at level 5. What's the explanation for this oddity? I've noticed this a couple of times before as well.

Note by Vincent Zhuang
5 years, 2 months ago

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As mentioned, the level on your profile tracks the problem set that you will receive next week, to give you an indicator of how you are performing. It will decrease if you get several problems wrong, and revert to normal as you get them right. Answering more correct could even increase your level on your profile (if you did well in the previous week + not Level 5).

Note that the level on your profile doesn't affect your current problem set, which stays the same.

Staff - 5 years, 2 months ago

Yes I've noticed the same thing in this week I was at level 5 in algebra and number theory and then It becomes level 4 and when I answered the problems of this week it has returned to level 5. So it depends on the number of correct answers in the problems.

- 5 years, 2 months ago

https://brilliant.org/faq/

- 5 years, 2 months ago

That's not explanation for why my level randomly goes up and down in the middle of the week.

- 5 years, 2 months ago

Is this on the profile where the level changes randomly or the actual problem sets?

If it's the profile, then I believe the level that's shown is the level the algorithm decides for you to be in if you stop answering problems at that moment. Correctly answering problems later on may "reverse" the "effects" of the algorithm.

- 5 years, 2 months ago

Yes exactly,If you incorrectly attempt a solution and leave the rest unsolved in a problem set assuming you did not perform too well the past week,you are demoted to a lower level. But once you correct that and attempt all the problems it will bring you back up to your previous level.

- 5 years, 2 months ago