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There is a highway that starts in the city of Savage. You must must place distance marker signs on this highway for the outgoing traffic. According to highway code, there must be a distance marker s …

Assume you have a jigsaw puzzle that is also a tessellation. This means every piece has an identical shape and can be assembled into a 2D pattern that fills the plane with no gaps. Such a jigsaw puz …

My job title was Tooling Engineer for a number of years, so I suppose it was fate that kept others from answering this question before I got around to seeing it. Or perhaps lack of CAD software. The …

For a starting number of otherwise identical coins there are among them TWO IDENTICAL counterfeit coins which are either heavier or lighter than the rest. Using a three-pan balance (described in de …

Please read part 1 or this might be confusing Since part 1, you have replaced the stolen stickers and your daughter has forgiven you. The highway ended up being a full 700km long, so you are happy t …

You are the math teacher at a high school and you are in charge of organizing Student Council for the whole school next year. Your boss, the Principal, read a research paper on Student Councils and m …

You only need to have read Part 1 to understand this question, reading Part 2 will only help understanding the epic storyline. Your daughter refuses to talk to you even though you have (once more) rep …

Forgive me for being late to the party, but I must nitpick all the other answers. Original question: "What is the closest planet to Earth on average?" All of you translated that into: "Which planet …

To start, I'll grab your attention with this 13-PMM: 11 7 3 8 1 4 10 5 6 12 9 2 13 6 4 1 7 0 2 7 2 2 1 0 0 13 It is the largest PMM I found, and coincidentally the first odd one. It repea …

Florian F's 2nd pattern is far and away my favorite, but if anyone was curious, I'll post my answers. First I wanted to show an example of something that doesn't work but really seems like it should: …

@ppgdev has gotten the right answer, but whether every detail was properly paid attention to... I don't know. There's a lot to unpack. I've had far more time on this problem, so allow me to explain i …

First: Assume Earth's population is 8,037,860,611 and they have ID numbers 1 through 8,037,860,611 You make a set of cards numbered 1 through 8,037,860,611 A robot goes to each person in turn and show …

You have an obscure job in 1600's Brussels. You make reference sticks. You own a high-quality ruler (which are quite rare in that era) and use it to cut lengths of wood or metal to certain lengths a …

Half jokey/ half serious answer: Or worse: Mama never told me not to play with axes