Toy enigma that challenges ingenuity. Solutions to puzzle may require recognizing patterns and creating a particular order. People with a high inductive reasoning aptitude may be better at solving these puzzles than others. Puzzles based on the process of inquiry and discovery to complete may be solved faster by those with good deduction skills. A popular puzzle toy is the Rubik's Cube, invented by Hungarian Ernő Rubik in 1974. Popularized in the 1980s, solving the cube requires planning and problem-solving skills and involves algorithms. There are many different types of puzzles, for example a maze is a type of tour puzzle.
-gry puzzle the answer "gry," an obsolete unit of measure invented by John Locke. It is unclear whether this was the answer given on the Grant show, or what the precise wording had been. By fall 1975 the puzzle had reached the Delaware Valley, again apparently by radio, by which time the puzzle seems to have mutated to a form in which the missing word is an adjective that describes the state of the world. The puzzle has had occasional bouts of popularity: after its initial popularity in 1975, it was popular in 1978, then again in 1995–1996. The most credible report