A review article is a journal article that summarizes the current state of understanding on a topic within a certain discipline. [1][2] A review article is generally considered a secondary source since it may …

A puzzle is a game, problem, or toy that tests a person's ingenuity or knowledge. In a puzzle, the solver is expected to put pieces together (or take them apart) in a logical way, in order to find the solution of …

An acrostic puzzle published in State Magazine in 1986 An acrostic is a type of word puzzle, related somewhat to crossword puzzles, that uses an acrostic form. It typically consists of two parts. The first …

Conway's Game of Life and fractals, as two examples, may also be considered mathematical puzzles even though the solver interacts with them only at the beginning by providing a set of initial …

This is a list of puzzle topics, by Wikipedia page.

The Zebra Puzzle is a well-known logic puzzle. Many versions of the puzzle exist, including a version published in Life International magazine on December 17, 1962.

An American-style 15×15 crossword grid layout A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") …

The New York Times example crossword grid Will Shortz does not write the Times crossword himself; a wide variety of contributors submit puzzles to him. A full specification sheet listing the paper's …