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2. Lunar arithmetic - Wikipedia

   en.wikipedia.org/wiki/Lunar_arithmetic

   It is not known whether there are any magic squares of squares of order 3 with the usual addition and multiplication of integers. However, it has been observed that, if we consider the lunar arithmetic operations, there are an infinite amount of magic squares of squares of order 3. Here is an example: [2]

3. Twenty-One Card Trick - Wikipedia

   en.wikipedia.org/wiki/Twenty-One_Card_Trick

   Animation demonstrating how the method excludes incorrect cards each time a pile is selected, leaving the selected card in position 11. When the cards are dealt out the second time, the selection will be the third, fourth, or fifth card in the pile it ends up in. In picking up the piles, the magician places this pile between the other two again.

4. Magic circle (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Magic_circle_(mathematics)

   A magic circle can be derived from one or more magic squares by putting a number at each intersection of a circle and a spoke. Additional spokes can be added by replicating the columns of the magic square. In the example in the figure, the following 4 × 4 most-perfect magic square was copied into the upper part of the magic circle. Each number ...

5. Magic square - Wikipedia

   en.wikipedia.org/wiki/Magic_square

   The smallest (and unique up to rotation and reflection) non-trivial case of a magic square, order 3. In mathematics, especially historical and recreational mathematics, a square array of numbers, usually positive integers, is called a magic square if the sums of the numbers in each row, each column, and both main diagonals are the same.

6. List of Schoolhouse Rock! episodes - Wikipedia

   en.wikipedia.org/wiki/List_of_Schoolhouse_Rock...

   The following is a list of the 65 music videos of the Schoolhouse Rock! series. Series overview Season Title Episodes Originally released First released Last released Network 1 Multiplication Rock 11 January 6, 1973 (1973-01-06) March 31, 1973 (1973-03-31) ABC 2 Grammar Rock 9 September 15, 1973 (1973-09-15) September 11, 1993 (1993-09-11) 3 America Rock 12 September 20, 1975 (1975-09-20 ...

7. Trachtenberg system - Wikipedia

   en.wikipedia.org/wiki/Trachtenberg_system

   Some of the algorithms Trachtenberg developed are ones for general multiplication, division and addition. Also, the Trachtenberg system includes some specialised methods for multiplying small numbers between 5 and 13. The section on addition demonstrates an effective method of checking calculations that can also be applied to multiplication.

8. Multiplication algorithm - Wikipedia

   en.wikipedia.org/wiki/Multiplication_algorithm

   A multiplication algorithm is an algorithm ... 11 3 1011 11 5 6 101 110 2 12 10 1100 1 24 1 11000 —— —————— 33 100001 Describing the steps explicitly ...

9. Mathemagician - Wikipedia

   en.wikipedia.org/wiki/Mathemagician

   Mathemagician is a neologism, specifically a portmanteau, that combines mathematician and magician. A great number of self-working mentalism tricks rely on mathematical principles, such as Gilbreath's principle .