4 teams play in a "round-robin" soccer tournament, in which each team plays each other team once. Each game has 3 possible outcomes: team 1 wins, draw, or team 2 wins. The winning team receives 3 points, while the losing team receives 0 points. In case of a draw, both teams receive 1 point. At th...

Define daytime in a country to be official dawn to sunset in their capital. (A terrible definition in Russia for example.) What time (GMT) and date is daytime in the largest number of countries?

There's a park behind the local basketball courts, where I like to go for quiet time. The other day, a group of thirty people arrived with a basketball as I was sitting down. One sat next to me, introduced himself as Marcel, and said he wanted me to watch the game his friends were going to play. ...

There is a $4$m by $4$m square pond. You have $3$ straight planks of wood, each exactly $2$m in length. You need to place the planks so that you can get from one corner of the pond to the diagonally opposite one. There is to be no plank overlapping. The planks must be laid rotationally symmetri...

Victor allis in his program VICTOR used his algorithm for six by seven connect four, his algorithm has proven to give a sure win. Is it possible to have similar algorithm for x by y board?

I get that typing ">! text" puts the text behind a spoiler, e.g: And I get that typing " - text" buts the text in a bullet point, e.g.: text How can I get the bullet into a single spoiler? ">! - text" doesn't work: and " - >! text" doesn't use a single spoiler e.g.: