This sequence of numbers is called the Fibonacci Numbers or Fibonacci Sequence. The Fibonacci numbers are interesting in that they occur throughout both. Fibonacci Sequence describes the mathematic theory behind the numbers.

The outer ring of ray florets in the daisy family illustrate the Fibonacci sequence extremely well. Daisies with 13, 21, 34, 55 or 89 petals are quite. Can you predict what the next numbers will be in each of these strings of digits?

123454321234543212...
11235813213455...
993751058209749...

The first sequence has a clear rhythm to it. The second is a little more tricky, but look closely and you might notice that it uses the previous numbers in the string to build the next one. This is the Fibonacci sequence, nature's favourite set of numbers and the first code to be cracked in Dan Brown's The Da Vinci Code. The third sequence is much trickier.

At first it looks random but if you come at it armed with the right knowledge you might recognise that it is part of the decimal expansion of pi, starting at the 44th decimal place. Once you know this you have total control over the sequence and can predict every twist as it speeds off to infinity.

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