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2. Free Online Puzzle Games - No Downloads - AOL Games

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   Browse and play any of the 40+ online puzzle games for free against the AI or against your friends. Enjoy challenging puzzle games such as Just Words, Letter Garden, Bubble Mouse Blast, Codeword ...

3. Matrix multiplication - Wikipedia

   en.wikipedia.org/wiki/Matrix_multiplication

   Matrix multiplication shares some properties with usual multiplication. However, matrix multiplication is not defined if the number of columns of the first factor differs from the number of rows of the second factor, and it is non-commutative, [10] even when the product remains defined after changing the order of the factors. [11] [12]

4. Mutilated chessboard problem - Wikipedia

   en.wikipedia.org/wiki/Mutilated_chessboard_problem

   The puzzle is impossible to complete. A domino placed on the chessboard will always cover one white square and one black square. Therefore, any collection of dominoes placed on the board will cover equal numbers of squares of each color. But any two opposite squares have the same color: both black or both white.

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6. Mathematical puzzle - Wikipedia

   en.wikipedia.org/wiki/Mathematical_puzzle

   Mathematical puzzles require mathematics to solve them. Logic puzzles are a common type of mathematical puzzle. 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 conditions. After these conditions are set ...

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   Simply Jigsaw. Piece together a new jigsaw puzzle every day, complete with themes that follow the seasons and a super useful edges-only tool. By Masque Publishing

8. Kronecker product - Wikipedia

   en.wikipedia.org/wiki/Kronecker_product

   In mathematics, the Kronecker product, sometimes denoted by ⊗, is an operation on two matrices of arbitrary size resulting in a block matrix.It is a specialization of the tensor product (which is denoted by the same symbol) from vectors to matrices and gives the matrix of the tensor product linear map with respect to a standard choice of basis.

9. Hadamard product (matrices) - Wikipedia

   en.wikipedia.org/wiki/Hadamard_product_(matrices)

   The Hadamard product operates on identically shaped matrices and produces a third matrix of the same dimensions. In mathematics, the Hadamard product (also known as the element-wise product, entrywise product [1]: ch. 5 or Schur product [2]) is a binary operation that takes in two matrices of the same dimensions and returns a matrix of the multiplied corresponding elements.