# Number (addition and subtraction): Rabbit Island

## Further Challenges

**How many different solutions are you able to find? How will you know if you have found all of the possible solutions?**- Look closely at this famous number sequence:

**1 + 1 + 2 + 3 + 5 + 8 + 13 + 21**

It was created by an Italian mathematician called Leonardo Fibonacci in the 12th century. He used the sequence to explain how the number of rabbits in a field (from which they could not escape or be eaten by predators) might grow from a single breeding pair after a month, a year and beyond.

**What do you notice about the sequence?**

** What is the next number in the sequence? **

**How far can you extend the sequence?**

Note: The Rabbit Problem by Emily Gravett is an excellent book to read alongside this particular challenge.