List of the site's news added October 6th, 2006

• Sudoku's French ancestors, article published in Pour La Science, June 2006. And soon in The Mathematical Intelligencer! See also the Michel Feuillée's letter, France, including an interesting 16x16 sudoku problem.
• Using the Morgenstern's 4x4 and 9x9 powerful methods, and my own 8x8 method, I generated:
• first known 9x9 semi-magic square of cubes
• first known 4x4 , 8x8 and 9x9 semi-magic squares of fourth powers
• On multiplicative magic squares:
• Games for you! I discovered that G. Pfeffermann, France, published multiplicative squares in 1893. But they were published as games: will you succeed to fill his 3x3, 4x4 and 5x5 multiplicative squares? He found the smallest possible 3x3 square twenty years before Harry Sayles.
• Pandiagonal multiplicative magic square of order 6 are possible. Here is my new 6x6 record using the smallest known magic product. It is also a "most-perfect" square.
•  5 720 160 45 80 1440 4800 12 150 192 300 6 9 400 288 25 144 800 320 180 10 2880 20 90 75 48 2400 3 1200 96 576 100 18 1600 36 50
• With this order 6, a lot of new other best known pandiagonal multiplicative magic squares built in 2006: orders 8, 9, 10, and more...
Look at the table summarizing the best known pandiagonal multiplicative squares.
• ??!!??  REMINDER of some of the most wanted problems on "small" objects, extracted from the updated Problems page:
• is it possible to construct a 3x3 magic square of squares? (using distinct integers)
• is it possible to construct a 4x4 magic square of cubes? (using distinct positive integers)
• is it possible to construct a 5x5 bimagic square? (using distinct integers)
• is it possible to construct a ?x?x? multiplicative magic cube using distinct integers < 416?