# Geometry and combinatorics

How is it possible that there are 31 people who solved this week's 300point problem of geometry and combinatorics 133 days ago. I can only assume the problem was posed already a couple of months ago. The ones who solved the problem back then are excluded from this week's competition? How does that work then? Another question is that after solving all problems I keep on getting bumped down the leaderboard not only by people with more lifetime points, but also by people with less lifetime points. How is this possible?

Note by Michael May
5 years ago

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• Yes, some of the problems each week have been posed to other users in the past. Users who have seen a problem in a weekly problem set are (almost) never shown that same problem twice. The system avoids showing people repeats although, from time to time, it is necessary.
• Users who saw the problem back then will see only new problems this week.
• We are working on clarifying the leaderboard sorting soon. Thanks for pointing out this inconsistency (it looks like you are getting pushed down by more recent problem solvers, which isn't fair.)

Staff - 5 years ago

is the leader board partially based on lifetime points?In that case,perhaps we need a better criteria for tiebreaking.Who solves first,is again not a good criteria.I may start my problem solving when I get time(maybe friday),and I'll never be able to appear in the leaderboard.number of trials needed to solve a problem seems like a fair criteria.(note:I've even seen my point going up on submitting a wrong answer at the 1st try).

- 4 years, 12 months ago