From nutritional labels and box office statistics to terabytes and megapixels, the 21st century world is awash in numbers. How can the average Joe or Jane make sense of all that data? The key, Theoni Pappas argues, is math. In *Mathematical Snippets,* she draws readers into the fascinating world of math without overwhelming them with mind-numbing equations. Short, engaging sections on everything from golf to game theory introduce mathematical concepts and celebrate math’s impact on daily life.

tank, a cannon • mechanical inventions: a mechanism that transforms vertical and horizontal motions for moving heavy loads; a machine that converts rotational motion into vertical motion through a cranking mechanism; a machine using lantern pinions, a worm screw tooth crank which turns a wheel for lifting loads, a chain used with notched wooden gears; a locking system for hoisting heavy loads, a cranking flywheel system, ball bearings used in various devices to reduce friction, pulley and rope

…jackson pollock & fractals math & your ring tones surfing with mathematics tackling murphy’s law with math the sierpinski triangle find its way into the grand egyptian museum the misplaced manuscripts fiasco the inheritance problem the möbius strip continues to twist our fancy saccheri missed the boat points of deception the sound of money witricity may cut the cord how do computers play chess? what powers mathematics? some

outstanding mathematicians. In both instances Cauchy was entrusted with the powerful and ground breaking work of young mathematicians Evariste Galois and Niels Abel. The Augustin Cauchy stamp issued on November 10, 1989 by France in celebration of his 200th birthday. In 1829 Galois(1811-1832) gave his paper containing his fundamental discoveries on the theory of equations to Cauchy who promised to submit it to the French Academy of Sciences. Not only did Cauchy not present it, claiming he

symmetry. This meant that the polyhedra building blocks fit together so that when they were rotated either 1/3, 1/4, or a 1/6 of a circle the pattern looked exactly like it did before turning it. The tessellation or tiling of triangles above possess six-fold symmtry because its tessellated pattern looks exactly the same six times in one complete turn. In other words a sixth of a turn does not change its pattern. Similarly the squares’ tiling has four-fold symmetry, while regular hexgons’ have

each has either a square or a circle on the other side. Which card(s) must you turn over to determine if every black card also has a square on its opposite side? puzzlers The number-check puzzle This clever puzzle was the creation of the famous English puzzlist Henry Ernest Dudeney (1857-1930). On a ring there are ten checks numbered 0 through 9. Divide them into three groups without removing them from the ring so that the product of the first and second group equals the third group of