Recently I found all the 22 existing ways to put 0 to 9 in the equation of a product such that each number occurs exactly once. And here they are: 5694×3=17082 6819×3=20457 6918×3=20754 8169×3=24507 9168×3=27504 3907×4=15628 7039×4=28156 9127×4=36508 5817×6=34902 3094×7=21658 4093×7=28651 9304×7=65128 9403×7=65821 594×27=16038 495×36=17820 402×39=15678 396×45=17820 715×46=32890 367×52=19084 297×54=16038 927×63=58401 345×78=26910   Also, as an extension, did the same after excluding zero: 1738×4= 6952 1963×4= 7852 483×12= 5796 297×18= 5346 198×27= 5346 157×28= 4396 186×39=...

  [Editor: This is the second post in a series about the Millenium Problems. This post is about the Riemann Hypothesis, probably the single most fascinating unsolved problem in all of mathematics. This hypothesis was first proposed by the mathematician Bernhard Riemann. Georg Friedrich Bernhard Riemann...

  [caption id="attachment_1842" align="aligncenter" width="640"] Group photograph of the workshop[/caption] The department of Mathematical Sciences, Tezpur University organized a Winter School and Conference on Algebra and Number Theory during December 23-29, 2011 which was mainly sponsored by the National Board for Higher Mathematics (NBHM), Department of Atomic...

  There seems to be a HALO of mysterious invisible material engulfing galaxies, which is commonly referred to as Dark matter. Scientists infer the existence of dark (=invisible!!!) matter from the observation of its gravitational pull, which causes the stars in the outer regions of a...