Fabulous Fibonacci and his number Magic!

Today is a special day for Bezlo Girls and Mathematics lovers everywhere, Fibonacci Day! You may be reading this and wondering who or what is Fibonacci? and why is today so special!? Well the reason may seem a bit complicated at first but in fact it’s very simple and we’re here to explain to you everything about it. 

First we need to learn about a Fibonacci sequence. It’s a very special sequence of numbers where every number can be summed by adding the two numbers before it.

November 23 is celebrated as Fibonacci Day because when you write the date using numbers and put the month first, in the month/day format, a Fibonacci sequence is created… 1, 1, 2, 3.

So when we look at the date today 11/23.. 1,1,2,3.

We can see that (1 + 1) =2, and also (1 + 2) =3.  

Why so cool?

We love the Fibonacci sequence because it is very close to the Golden Ratio. If you divide two consecutive Fibonacci  numbers, the result is pretty close to 1.618. This golden number has fascinated many musicians, artists, engineers and many more. Famous artists like Leonardo Da Vinci creations are based on the golden ration. Any objects whose length and breadth show the Golden Ratio are thought to be the most pleasing to the eye. We love this magic mathematics sequence that makes things look great!


Mona Lisa by Leonardo Da Vinci is created according to the golden section.



The Fibonacci sequence appears in many places, it’s a like a secret code that Bezlo Girls will love to discover. Here is an example of the start of a Fibonacci sequence: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377.

Can you figure out the next numbers?

Fibonacci in nature…


If you pick a daisy from your garden and pull off all of it’s petals you can see that the yellow centre of the flower isn’t solid. It’s is made up of lots of lovely swirls that spiral outwards from the centre. These swirls are just one example of the Fibonacci sequence and they can be found in all kinds of things such as sea shells, space and even artichokes.


In fact, if you look at any flower it is likely to only have 3,5,8,13 or 21 petals.



The golden triangle…

There is a whole other set of patterns in nature that are based on something called the golden triangle! A rectangle whose side lengths are Fibonacci numbers like 8×13. This rectangle can be divided up into a series of squares who lengths are also Fibonacci numbers. 


When you draw an arc from one corner of each square to another, they join to form a spiral that just so happens to be like the spiral we see in nature- in flower petals, sea shells and snails.


Golden Triangle seen in Greek architecture, courtesy of Sebastien Bertrand.


Let’s learn more about the mathematician behind the Fibonacci sequence magic…Leonardo Pisano Bigollo.

How can you celebrate Fibonacci Day?

Lots of fruits and vegetables like pineapples, broccoli & brussels sprouts contain the Fibonacci sequence – you could eat them in your meals today.

You could also try some fun Fibonacci activities like cutting across an apple to see the 5-seed chamber or counting the spirals in a sunflower head – there are almost always 34 or 55 (or another Fibonacci number).

Enjoy this fun Fibonacci Day & it’s mathematics magic! We leave you with beautiful image…yes Fibonacci sequence and the golden section can even be seen in waves!  


Love always,

Clodagh and Hello Bezlo team


If you liked this Blog Post, maybe you would also like to read more on the Fibonacci sequence and the Golden Section.

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