The colours used are blue, yellow, pink, and green, and the shapes are arranged left to right, each with a number beneath it: 1550, 1212, 3011, and a final question mark. The puzzle asks ...

The shapes of electrons: Solving a cryptic puzzle with a little help from a hologram. ScienceDaily . Retrieved May 30, 2025 from www.sciencedaily.com / releases / 2016 / 10 / 161006103927.htm ...

It consists of 14 puzzle pieces that can fit together in the form of many different shapes. There are 536 different ways to fit the pieces together as a square. Then there’s the Eternity Puzzle ...