Posts Tagged ‘Math %’


The Terrifying Math of Running from a Bear … USA Units

July 17, 2017



Grizzly Bear

Weight:  550 lb        

Height:  8’ 2”   

Top Speed: 35 mph  =   51 ft/s    

Brown Bear

Weight:  1,500 lb       

Height:  8’ 2”              

Top Speed: 22 mph  =  32 ft/s     

Comparing these speeds to the fastest man on earth, Usain Bolt:

Usain Bolt:

Top speed: 27 mph  =   40 ft/s     

Bears are not dangerous:


In fact, more Americans die each year from choking on their own vomit than are killed by bears.

More death stats here

Nevertheless, bears are very fast. So you can see why Park Rangers offer the following advice:

More information at Mountain Nature.

The reason for waiting until the bear is 15 ft away is to make sure the spray doesn’t disperse in the air. If the Pepper Spray is too spread out it will not stop the bear.

Ref: Dog helps save hikers after grizzly chases them for 20 minutes.


Crazy Ways to Make Middle School Maths Cool

November 11, 2016



I started my maths workshop in Hamburg by stirring up some friendly rivalry.  And what better way to do this than by using statistics.

Which is the biggest country?

Australia is 21.5 times the area of Germany. So I counted off 22 workshop participants and pointed to one saying ‘Your’re Germany! Ha!’ Here’s another way to compare areas:


Which country has the largest population?

Germany has 3.5 times the population of Australia.

But the really interesting questions are:

Who drinks more beer?

Who eats more meat?

Here are the answers to these and other interesting questions from the introduction to my workshop with apologies to Brisbane and Perth:

Here are some amazing ways to make middle school maths AMAZING:

1. Defronting the Maths Classroom

2. Amazing German Maths Blog

3. m&ms and Exponential functions

4. Take a Mandelbrot Set Selfie

5. Best Fun with Algebra Ever

6. The Multi-legged Beast that Walks

7. Maths You Hold in Your Hand

8. Are you Maths Blind?

9. Real World Maths Selfies 

10. Magical Music Machine built with Maths

And don’t forget:

Maths News from around the World


One Second

June 27, 2016

1 Second Logo

1 Second Logo 2a

1 second 1 Mathspig1 Seccond 2 Mathspig1 Second 3 Mathspig

1 Second 4 Mathspg

1 Second 5 Mathspig1 Second 6 Mathspig1 Second 7 Mathspig1 Second 8 Mathspig


Best Ever Fun with Algebra

June 9, 2016

Mathspig gravity plane

We all know about gravity. We worry about gravity.


If someone holds a pen in your hand like the gif below, then drops it,

I bet, if you keep your hand in the one position, that you can’t grab it!!!!

The maths is soooo beautiful.


All objects and bodies drop at the same rate of acceleration, g = 9.8 m/sec2

d = distance travelled by falling object (m)

t = time taken (sec)

pen drop formula 1

pen drop formula 2

You can test your reaction time on THE REACTION TIME CLOCK HERE.



June 3, 2016

Mathspig Football Maths 1

Mathspig football Maths 1a

Mathspig Football Maths 2aMathspig Football Maths 3Mathspig Football Maths 4


The following maths is suitable for Year 9+

but can be presented to lower grades just to show

maths is cool!

Mathspig Football Maths 5Mathspig Football Maths 6bMathspig Football Maths 7


Maths Doesn’t Have to be the UGLY DUCKLING?

June 1, 2016

Mathspig Fairy Petunia Pigsnort

Even small children can think maths is hard work.

But it can be just as much fun as any other subject

if we use our imagination.

Maths does not have to be the UGLY DUCKLING

of school work.


A Maths Fairy Tale for Grade 2

May 12, 2016

A Maths FAiry Tale Mathspig

Once upon a time, Grade 2 students did very boring work in maths. And they had to do lots of tests too.


Sometimes evil witches wrote the test questions. These Year 2 (Grade 2) questions were very, very scary. Here is one of those very scary questions. It was so scary lots of people turned into angry birds when they saw this question. The angry birds tweeted that this question is ” too hard’. Tweet! Tweet! (The Telegraph , UK, 9 May, 2016)

A very wise old Mathspig worked out the answer.

X -19 +17 = 63

                X = 65

Mmmmm, this is a scary question for Grade 2. 

Many Grade 2 teachers are Wonderful Maths Wizards. They make maths magical and fun everyday. Students must sharpen their pencils and put on their wizards thinking hats to practise their maths. But maths can be magical and fun too. So here is:


by Mathspig

A Wonderful Maths Wizard teacher can read the story out loud and the little Grade 2 Maths Wizards can write down their answers.


Tooth Fairy Math Mathspig 1

Tooth Fairy Mathspig 2a

Printable Version below.

A Maths Fairy Tale 1

A Maths Fairy Tale 2

A Maths Fairy Tale 3