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|Simon Singh and Marcus du Sautoy, BBC Radio 4|
|Web pages and Real Audio Music downloads of fifteen minute-long radio broadcasts that take a "quirky look" at zero, pi, the golden ratio, i, and infinity. "Hear about the stark reality behind the imaginary number, try a slice of pi, find out about the natural beauty of the golden ratio, discover why some infinities are bigger than others, and see why nothing really matters." The follow-up radio series Another 5 Numbers, A Further 5 Numbers, and 5 Shapes similarly discuss the numbers one (1), two (2), four (4), six (6), and seven (7); Ramanujan and Hardy's taxicab number (1729); the largest prime; Cavendish's gravitational constant G (6.67 x 10−11); the shapes of the cube, the pyramid, the sphere, the bagel (or torus), and "the blob"; plus Kepler's Conjecture, and game theory.|
|Levels:||Late Elem. (3-5), Middle School (6-8), High School (9-12), College|
|Math Topics:||Number Sense/About Numbers, Golden Ratio/Fibonacci, Imaginary/Complex Numbers, Infinity, Pi, Higher-Dimensional Geometry, Number Theory, Architecture|
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