For the first time, a photo was taken with every person, living or dead, in frame. Everyone that is except for three. Who were those three?

Denny owns a demolition company and has successfully managed a strong, sharp team of more than 30 specialists for over 20 years. His team works well together and has decades of experience, having completed well over 12,000 demolitions and making a name for themselves. They are definitely on the c...

Here is a circular coin with diameter D Figure A From its starting position the small coin goes completely around a bigger circular body of diameter 4D without slipping, always in contact with the bigger circle, rotating around its own center point and returns to its original posit...

The Square Spin series of puzzles is a bit abstract. There is quite a lot for newcomers to digest and getting started may be daunting. Even if you thoroughly read the rules and intend to attempt one of these puzzles, actually finding the solution may be difficult without any knowledge of techniqu...

I'm sure this has been asked before, but I tried searching and couldn't find it. I don't know the solution, and it is possible there isn't one. There is unsavoury pirate and an unscrupulous merchant. The Pirate would like to trade some of his ill-begotten treasure for some shady merchandise. ...

This is a revamped version of my puzzle Mysterious loss of weight . I plan to make a series of puzzles on mysterious loss of ... say a number. A man went into a black room full of white papers lying around him. He presses a button. All the papers fly including the document which was loosely held...

This puzzle is inspired by recent 3D nonogram puzzles by Jafe and Omega Krypton. Check those out if you want, but they are not required to understand this puzzle. This 3D nonogram has clues with two possible colors, gray and black. Cells that are neither (typically labelled with an "x" when so...

You all have us, but you don't know why. Our much more useful cousins are waiting right nearby We can't do much, but we're sensitive things. We can hardly stand up to the abuse that you bring. You run us straight through without second thought. Do you stop when we ask...

This is not my puzzle, and I don't remember the source, but I don't see it posted here yet, so... A subway station has three escalators running side-by-side. One escalator only descends from the street to the subway platform, and the other two escalators only ascend from the subway platform to t...

I was wandering around on Capitol Hill recently, thinking about codes and ciphers and not paying attention to where I was, when suddenly it hit me. No, really: a blast of wind blew a paper right into my face. I looked at it and saw the following: 0589-9443-2472-6354-0391-2302-2375-7868-2378-8...