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2. Four fours - Wikipedia

   en.wikipedia.org/wiki/Four_fours

   The puzzle requires skill and mathematical reasoning. The first printed occurrence of the specific problem of four fours is in Knowledge: An Illustrated Magazine of Science in 1881. [ 1 ] A similar problem involving arranging four identical digits to equal a certain amount was given in Thomas Dilworth's popular 1734 textbook The Schoolmaster's ...

3. Mutilated chessboard problem - Wikipedia

   en.wikipedia.org/wiki/Mutilated_chessboard_problem

   The mutilated chessboard problem is an instance of domino tiling of grids and polyominoes, also known as "dimer models", a general class of problems whose study in statistical mechanics dates to the work of Ralph H. Fowler and George Stanley Rushbrooke in 1937. [1]

4. 3D Ultra Lionel Traintown - Wikipedia

   en.wikipedia.org/wiki/3D_Ultra_Lionel_Traintown

   Each difficulty has 11 jobs, then unlocking a twelfth. Most jobs are based on picking up and delivering loads via freight and passenger cars. Other jobs involve moving numbered freight cars to make valid addition, subtraction, multiplication, and division equations at kindergarten through fifth grade difficulty levels.

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   www.aol.com/games

   Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

6. Krypto (game) - Wikipedia

   en.wikipedia.org/wiki/Krypto_(game)

   A spread of Krypto cards: players must find a way to calculate 12 using the numbers 5, 19, 8, 3 and 6. Krypto is a card game designed by Daniel Yovich in 1963 and published by Parker Brothers and MPH Games Co. [1] It is a mathematical game that promotes proficiency with basic arithmetic operations.

7. Sideways Arithmetic from Wayside School - Wikipedia

   en.wikipedia.org/wiki/Sideways_Arithmetic_from...

   But when Sue inadvertently gets a question correct, Mrs. Jewls lets her stay. Chapter 4 contains more verbal arithmetic problems, this time with multiplication. Beginning with chapter 5, the book switches to logic and optimization problems. In this chapter, students have to determine what happened at recess through logical elimination.