Simon Singh's Numbers Episodes Available now
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1729 - The first taxicab number—A Further Five Numbers
1729 is the smallest number you can write as the sum of two cubes, in two different ways.
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G - The number that defines the universe—A Further Five Numbers
Newton's equation of gravity includes a number G, indicating the strength of gravitation.
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Six degrees of separation—A Further Five Numbers
Six is often treated as 2x3, but has many characteristics of its own.
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Two - At the double—A Further Five Numbers
Doubling is a form of exponential growth, which appears in population growth and inflation
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One - The most popular number—A Further Five Numbers
One is the most popular number, as it appears more often than any other number.
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Game Theory—Another Five Numbers
When 3G phone licences were sold, game theory was used to boost proceeds for the Treasury.
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Kepler's Conjecture—Another Five Numbers
Is the 'face-centred cubic lattice' the most efficient way of stacking spheres?
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The Largest Prime—Another Five Numbers
Can large prime numbers be used to form the basis of more secure encryption codes?
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The Number Seven—Another Five Numbers
Are 7 shuffles sufficient to achieve a good degree of randomness in a deck of 52 cards?
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The Number Four—Another Five Numbers
Are 4 colours enough to paint any map, so neighbouring countries have different colours?