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(originally called Number Place), is a logic-based, combinatorial number-placement puzzle.

The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid (also called "boxes", "blocks", "regions", or "subsquares") contains all of the digits from 1 to 9.

The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a unique solution.

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.

The March 25, 1963, issue of Life contained the solution and the names of several hundred solvers from around the world.

The tangram is a dissection puzzle consisting of seven flat shapes, called tans, which are put together to form shapes.

The objective of the puzzle is to form a specific shape (given only an outline or silhouette) using all seven pieces, which may not overlap.

It is reputed to have been invented in China during the Song Dynasty, and then carried over to Europe by trading ships in the early 19th century.

It became very popular in Europe for a time then, and then again during World War I.

It is one of the most popular dissection puzzles in the world.

A Chinese psychologist has termed the tangram "the earliest psychological test in the world", albeit one made for entertainment rather than for analysis.

A word search, word find, word seek, word sleuth or mystery word puzzle is a word game that consists of the letters of words placed in a grid, which usually has a rectangular or square shape.

The objective of this puzzle is to find and mark all the words hidden inside the box.

The words may be placed horizontally, vertically, or diagonally.

Often a list of the hidden words is provided, but more challenging puzzles may let the player figure them out.

Many word search puzzles have a theme to which all the hidden words are related.

The puzzles have, like crosswords and arrowords, been very popular in the United Kingdom, and - also in common with these latter puzzles - have had complete magazines devoted to them.

Peg solitaire (or Solo Noble) is a board game for one player involving movement of pegs on a board with holes.

Some sets use marbles in a board with indentations.

The game is known simply as Solitaire in the United Kingdom where the card games are called Patience.

It is also referred to as Brainvita (especially in India).