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October 4

Logic riddles

Hi there,
I look for a collection or a site of logic riddles.
The riddles can and should be related to probability, and maybe Combinatorics?
The riddles should be difficult, but solvable, for an intelligent person.
They should not require a degree in math, though, of course math skills should be helpful.
Thanks. — Preceding unsigned comment added by 77.126.34.241 (talk) 17:58, 4 October 2015 (UTC)[reply]

[[1]] Bo Jacoby (talk) 18:22, 4 October 2015 (UTC).[reply]

There will be some about probability and combinatorics among those, don't know how difficult though: international math olympiade: http://www.imo-official.org/problems.aspx Ssscienccce (talk) 21:42, 5 October 2015 (UTC)[reply]

Google gives loads of sites for math riddles, logic riddles... you know what you like, for us it's hard to decide what would be a good site. Ssscienccce (talk) 04:00, 7 October 2015 (UTC)[reply]

Alex Bellos at The Guardian does a weekly maths/logic puzzle. They cover quite a range of topics, but recent probability/combinatorics problems include: the rugby problem, the coin and the chessboard and population-planning. Smurrayinchester 15:10, 8 October 2015 (UTC)[reply]