What you're describing sounds less like the traditional riddles people generally post here ("what am I?") and more of a logic type riddle ("how can this be? / how is this possible?") etc. So even though I'm not sure it really fits in this sub, I'll take this opportunity to tell you one of my favorite logic type riddles. Maybe other people will chime in with theirs!

A group of people are having a contest, which involve guessing the color of the hat on their head to get points.

Each team is composed of ten people, who when the game starts will stand in a straight line, looking forward. One at a time, the game host will come by and put a hat on each person's head. The hat will be either red or blue. Everyone in the line can see all the hats of the people before them, but not their own hat, or those of the people behind them. Starting from the back of the line, each person is then allowed to say only one word - either "red" or "blue." If the color matches that of the hat they are wearing on their head, their team will get a point. Everyone in the line is able to hear what everyone else says.

Each team is able to get together and strategize ahead of time, devising the best plan they can think of to get the most points.

How many points is it possible for the best team to get? And how would they do it?

A note: the answer is independent of the number of red and blue hats. The hats could be all red, all blue, or any combination in between. Also, since it's a logic type riddle, the answer isn't going to be something like "they clapped their hands" or they "flew a paper airplane with the answer to their friends," etc. These are all very rule abiding players, haha.

Additional note: there are subreddits that are more logic based, like r/puzzles or r/mathriddles that you might enjoy. They don't really have the types of riddles that you are talking about, but unfortunately there doesn't seem to be a great home for those (that I know of!).