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  2. 30 Math Puzzles (with Answers) to Test Your Smarts - AOL

    www.aol.com/30-math-puzzles-answers-test...

    Number puzzles Fireworks. ... (i.e. two of the numbers form a two-digit number)? Answer: 6. Read every row as follows: ... Which number is missing on the bottom credit card? Answer: 8. The number ...

  3. Strimko - Wikipedia

    en.wikipedia.org/wiki/Strimko

    Strimko is a logic number puzzle invented by the Grabarchuk Family in 2008. It is based on the idea of Latin squares described by the Swiss mathematician and physicist Leonhard Euler in the 18th century. All Strimko puzzles are solvable with pure logic; no special knowledge is required. Strimko uses only three basic elements: rows, columns, and ...

  4. Survo puzzle - Wikipedia

    en.wikipedia.org/wiki/Survo_Puzzle

    Numbers 3, 6, and 8 are readily given. The task is to put remaining numbers of 1-12 (3×4=12) to their places so that the sums are correct. The puzzle has a unique solution found stepwise as follows: The missing numbers are 1,2,4,5,7,9,10,11,12. Usually it is best to start from a row or a column with fewest missing numbers.

  5. Cross-figure - Wikipedia

    en.wikipedia.org/wiki/Cross-figure

    Example grid for a cross-figure puzzle with some answers filled in. A cross-figure (also variously called cross number puzzle or figure logic) is a puzzle similar to a crossword in structure, but with entries that consist of numbers rather than words, where individual digits are entered in the blank cells.

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  7. 15 puzzle - Wikipedia

    en.wikipedia.org/wiki/15_puzzle

    Named after the number of tiles in the frame, the 15 puzzle may also be called a "16 puzzle", alluding to its total tile capacity. Similar names are used for different sized variants of the 15 puzzle, such as the 8 puzzle, which has 8 tiles in a 3×3 frame. The n puzzle is a classical problem for modeling algorithms involving heuristics.