Does 1 = 0.9999...?

Ask yourself the question first. What do YOU think about the question and why?

How about the other ninths?

Once you have puzzled over this question, please enjoy the following two videos from Numberphile and Vi Hart, two legends.

Puzzling needs to take at least five minutes.

Also, DP students, the previous post is very new with you in mind. All others are very welcome.

Vi Hart

Numberphile

Pi - in it is everything π

Ask a Mathematician / Ask a Physicist

Q: Since pi is infinite, do its digits contain all finite sequences of numbers?

Posted on November 8, 2009 by The Mathematician

Mathematician: As it turns out, mathematicians do not yet know whether the digits of pi contains every single finite sequence of numbers. That being said, many mathematicians suspect that this is the case, which would imply not only that the digits of pi contain any number that you can think of, but also that they contains a binary representation of britney spears’ DNA.... read more in the site. Click the Question, the link 

Fascinating stuff!

Synchronisation or Synchronization depending on your point of view, it's all pretty cool

Lots of people are posting a video about a murmuration of starlings on social networks. I came across this video and others many years ago and I wish to see it at a large scale one day.

For more collective noun names for animals that are as cool as a murmuration of starlings and a murder of crows check this out. It's about naming a group of animals, so technically they are mathematical terms. You can't be a called a group without counting to check if there are more than one of something present.

What's your favourite?
Do you do the same thing in your mother tongue?



On the TEDtalk page of our mathematics blog is a video about synchronisation in every day occurrences. I think you will enjoy it.  Steven Stogatz and his talk on "How things in nature tend to sync up" should be at the top of the blog page.

Is there a 4th Dimension

After an interesting chat with Dreem in class I thought I would post this great video from the excellent Minute Physics Youtube Channel.

Teeny and Huge Things - magnitude

When we study teeny tiny things and large things from whales to the universe we use scientific notation and names.

Here are some of the sites we used in MYP5 today:

Scale of the Universe

cells and scale - slidy thing

And some more mathematical treats
xkcd measuring the universe

MYP5, Speed of Light - Good Geekery with Minute Physics. Minute Earth

Today we answered some of our bigger questions that emerged from wondering how long light from Earth takes to get to the moon.  We used this to explore scientific notation, exponents, large numbers and more.

When I have big questions one of my favourite Youtube Geekery Channels is minute physics - hope you like it too.

We wondered if light would travel forever in the universe and if we could see the light (from a torch) on the moon when we turned it on and off.  What can we see from the moon on Earth?

More questions emerged after these videos what is the speed of light in a vacuum (space)? what is the speed of light in water (space)? can animals see more stars than us?

Here are some cool geek videos that answer questions but make you ask even more...




and this for does the torch light beam widen and more

Is Maths Real?

A couple of students asked me if numbers were real or did we make them up. How about the bigger question that surrounds numbers, Mathematics itself.

Thanks to Ajarn Brian for sharing this video with me so that I can now share it with you.