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  2. Spot the difference - Wikipedia

    en.wikipedia.org/wiki/Spot_the_difference

    Visual comparison may be used to solve the puzzle. The solution to the puzzle is often listed nearby or in an accompanying answer page of a puzzle book. Additionally, one can cross one's eyes and merge the two pictures into one, in the much the same way as when viewing an autostereogram picture. The differences will appear to blink in and out ...

  3. Self-reference puzzle - Wikipedia

    en.wikipedia.org/wiki/Self-reference_puzzle

    A self-reference puzzle is a type of logical puzzle where the question in the puzzle refers to the attributes of the puzzle itself. [1] A common example is that a "fill in the blanks" style sentence is given, but what is filled in the blanks can contribute to the sentence itself. An example is "There are _____ e's in this sentence.", for which ...

  4. Balance (puzzle) - Wikipedia

    en.wikipedia.org/wiki/Balance_(puzzle)

    9th World Puzzle Championship balloon balance puzzle. A balance puzzle is a mathematical puzzle which challenges the solver to distribute a subset of numbers so that the several sides of a stylized diagram representing a balance scale are equal. The balance puzzle is a classical number puzzle in the World Puzzle Championship. It consists of a ...

  5. Situation puzzle - Wikipedia

    en.wikipedia.org/wiki/Situation_puzzle

    N/a (or stating "irrelevant") is used when a question is not applicable to the current situation or when a "yes" or "no" answer would not provide any usable information to solving the puzzle. Irrelevant, but assume yes (or no ) is used when the situation is the same regardless of what the correct answer to the question is, but assuming one ...

  6. Coding interview - Wikipedia

    en.wikipedia.org/wiki/Coding_interview

    [2] [3] Coding interviews test candidates' technical knowledge, coding ability, problem solving skills, and creativity, typically on a whiteboard. Candidates usually have a degree in computer science , information science , computer engineering or electrical engineering , and are asked to solve programming problems, algorithms , or puzzles .

  7. Wason selection task - Wikipedia

    en.wikipedia.org/wiki/Wason_selection_task

    The Wason selection task (or four-card problem) is a logic puzzle devised by Peter Cathcart Wason in 1966. [1] [2] [3] It is one of the most famous tasks in the study of deductive reasoning. [4] An example of the puzzle is: You are shown a set of four cards placed on a table, each of which has a number on one side and a color on the other.

  8. Puzzle - Wikipedia

    en.wikipedia.org/wiki/Puzzle

    A chess problem is a puzzle that uses chess pieces on a chess board. Examples are the knight's tour and the eight queens puzzle. Mechanical puzzles or dexterity puzzles such as the Rubik's Cube and Soma cube can be stimulating toys for children or recreational activities for adults. combination puzzles like Peg solitaire

  9. Hotaru Beam - Wikipedia

    en.wikipedia.org/wiki/Hotaru_Beam

    Solution to earlier Hotaru Beam grid. A circle with 0 on it (not the same as a blank circle) is a given: It will have at least one line going straight in the direction of the dot until it hits another circle.