No 54

 Amazing Number Fact No 54

Rabbit Numbers

Leonardo of Pisa wondered how many pairs of rabbits would be produced in the nth generation starting from a single pair of rabbits and assuming that any pair of rabbits from one generation produces one pair of rabbits for the next generation and a further pair of rabbits for the generation after that, and then they die.
This picture shows the first two generations and what they produce:
The diagrams become more complicated but here are the next two generations and some of their offsprings:
So far the numbers produced in each generation are as follows:

generation 1

generation 2

generation 3

generation 4

generation 5

1

1

2

3

5
Try to draw a diagram showing the numbers produced in generations 6 and 7. There is an easier way to produce the "Rabbit Numbers" sequence. Can you discover it? Leonardo's nickname was Fibonacci. These numbers have come to be known as the Fibonacci Numbers.
[This Amazing Number Fact is dedicated to Class 1H at Madras College, St Andrews (99-00)]
If you have answers, discoveries, new questions etc to do with this Number Fact then...
E-mail us at madrascollege.maths@fife.gov.uk
...and we will publish them here.

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