A good puzzle is part problem-solving and part magic. In the following quiz, we test your knowledge of some of the world's most mystifying 3-D puzzles. Are you ready to get stumped?
Made from a 14-piece dissection of a square, the Loculus of Archimedes required solvers to arrange the pieces in specific shapes, like elephants and ducks. A 2003 computer simulation found 536 distinct solutions to the ancient puzzle.
The Saudi Arabian government specially ordered a 3-D jigsaw puzzle of Mecca, but then rejected the finished product as idolatrous because it looked "too realistic."
3-D puzzles were all the rage back in 1997, when The New York Times reported that Wrebbit was cranking out 30,000 puzzles a day.
Gallant worked as a marketer and distributor for a Quebec-based classical music record label when he thought of the idea for 3-D jigsaw puzzles made from polyethylene foam.
43,000 trillion combinations, but only one possible solution.
Among the 43,000 clips available are a 3-year-old Chinese girl solving the cube in 114 seconds, a Rubik's rap and lots and lots of speedcubing.
Feliks Zemdegs of Australia pulled off the lightning fast time of 5.6 seconds in the Melbourne Winter Open in 2011. His average for his five solves was 7.64 seconds.
In the blindfolded competition, solvers are given 15 seconds to examine a scrambled cube and then blindfolded. Kuti solved 18 puzzles; average solve times hover around a minute.
Graham Parker of Portchester, England claims to have solved his cube after more than two decades of nearly continuous frustration.
The Ortega method is recommended for beginners, while most speedcubers use the Fridrich method, including the current world record holder, Feliks Zemdegs.
According to puzzle box lore, a few very large puzzle boxes have been handcrafted in Japan that require more than 100 moves to open. This one takes 125 moves to solve.
It took 2.5 years for IBM supercomputers to calculate the 35 billion possible positions and combinations that could be attempted with the six pieces of a Burr puzzle.
The late Harry Eng was a master of the impossible puzzle, filling glass bottles with solid objects that are way too large to have passed through the bottle's opening, like solid pieces of wood, decks of cards and padlocks.
The craze began in America and Europe in 1880, then spread to Asia and beyond. A literally impossible version of the game, called the 14-15, or the Boss Puzzle, followed in its wake with several phony solvers claiming to have bested it.
Architect and professor Erno Rubik's ingeniously simple "Magic Cube" would go on to sell over 350 million units worldwide.
Other events include one-handed solving, blindfolded solving, and solving variations on the cube, including 4X4, 5X5, 6X6, and 7X7 cubes.
Milan Baticz of Hungary completed this 4,786-cube marathon solving session on November 17, 2008.
The 3,141-piece puzzle encompasses the entire New York City skyline as viewed from Lower Manhattan, including the former Twin Towers.
Created for the 1982 Knoxville World's Fair (parodied brilliantly on The Simpsons), the 10-foot (3.04-meter) tall, 1100-pound (498.95-kilogram) cube actually functioned through a series of motors.
The 12-sided cube contains 975 individual moving pieces, is about the size of a large grapefruit and is nearly impossible to solve when fully scrambled.