March 18, 2022

## A COOL MIDDLE SCHOOL MATH EXERCISE

This idea comes from Burkard and Giuseppe @ the fabulous MATHOLOGER channel. Students can make a pattern called a cardioid that pops up all over math according to Burkard.

Follow these steps. There is a pdf file below the first diagram for printing exercise sheets.

And then watch the MATHOLOGER video for a really interesting explanation.

x2 Tables on a Circle pdf file for printing

This circle graph blank could also be used for x3 and x4 tables, which produce totally different yet equally amazing patterns.

Halfway there, now it gets tricky. +52 to each point on the circle and keep multiplying by 2.

ie. 27 x 2 = 54, 28 x 2 = 56 and so on.

so 0 = 52, 1 = 53, 2 = 54, 3 = 55, 4 = 56 etc

This shape is called a CARTIOID.

May 25, 2021

## Click on the POP-UP answers under each question.

1. How many bristles in a toothbrush?

2. What % of Oxygen in the atmosphere comes from forests?

3. How loud was the loudest recorded human scream?

4. How many apples could kill an average-sized adult?

5. How many countries in Africa?

6. What happens when you Google this number, 241543903?

7. How many vertebrae in a giraffe’s neck?

8. What is the highest recorded wind speed?

9. What is the world record high-jump height for a guinea pig?

10. How many times does England fit into Australia?

11. How much did the most expensive dessert ever cost?

12. Why is 70 a weird number?

14. How many burgers does McDonalds sell a second worldwide?

15. If the population of the world was spread evenly across the USA, what area would we get each in basketball court sections?

16. How many times was the most frequently married person in the world, married?

17. Why is Zero Zero Zero like 123?

18. What is the world record for the greatest number of snorts in 10 seconds?

19. How long would it take to grow your hair to your feet?

20. What number causes the greatest loss of money in the world?

1. How many bristles in a toothbrush? HERE

2. What % of Oxygen in the atmosphere comes from forests? HERE

3. 3. How loud was the loudest recorded human scream? GOOGLE IT!

4. How many apples could kill an average-sized adult? HERE

5. 5. How many countries in Africa? GOOGLE IT!

6. What happens when you Google this number: 241543903? HERE

7. How many vertebrae in a giraffe’s neck? HERE

8. What is the highest recorded wind speed? HERE and HERE

9. What is the world record high-jump height for a guinea pig? GOOGLE IT!

10. How many times does England fit into Australia? GOOGLE IT!

11. How much did the most expensive dessert ever cost? GOOGLE AGAIN.

12. Why is 70 a weird number? HERE

14. How many burgers does McDonalds sell a second worldwide? HERE

15. If the population of the world spread across the USA , what area would we get each?

16. How many times was the most frequently married person in the world, married?

17. Why is Zero Zero Zero like 123? HERE

18. What is the world record for the greatest number of snorts in 10 seconds? HERE

19. How long would it take to grow your hair to your feet? HERE

20. 20. What number causes the greatest loss of money in the world? HERE

April 26, 2021

# POP UP ANSWERS … click on Q.

1. How many bristles in a toothbrush?

2. What % of Oxygen in the atmosphere comes from forests?

3. How loud was the loudest recorded human scream?

4. How many apples could kill an average-sized adult?

5. How many countries in Africa?

6. What happens when you Google this number, 241543903?

7. How many vertebrae in a giraffe’s neck

8. What is the highest recorded wind speed?

9. What is the world record high-jump height for a guinea pig?

10. How many times does England fit into Australia?

11. How much did the most expensive dessert ever cost?

12. Why is 70 a weird number?

14. How many burgers does McDonalds sell a second worldwide?

15. If the population of the world was spread evenly across the USA, what area would we get each in basketball court sections?

16. How many times was the most frequently married person in the world, married?

17. Why is Zero Zero Zero like 123?

18. What is the world record for the greatest number of snorts in 10 seconds?

19. How long would it take to grow your hair to your feet?

20. What number causes the greatest loss of money in the world?

1. How many bristles in a toothbrush? HERE

2. What % of Oxygen in the atmosphere comes from forests? HERE

3. 3. How loud was the loudest recorded human scream? GOOGLE IT!

4. How many apples could kill an average-sized adult? HERE

5. 5. How many countries in Africa? GOOGLE IT!

6. What happens when you Google this number: 241543903? HERE

7. How many vertebrae in a giraffe’s neck? HERE

8. What is the highest recorded wind speed? HERE and HERE

9. What is the world record high-jump height for a guinea pig? GOOGLE IT!

10. How many times does England fit into Australia? GOOGLE IT!

11. How much did the most expensive dessert ever cost? GOOGLE AGAIN.

12. Why is 70 a weird number? HERE

14. How many burgers does McDonalds sell a second worldwide? HERE

15. If the population of the world spread across the USA , what area would we get each?

16. How many times was the most frequently married person in the world, married?

17. Why is Zero Zero Zero like 123? HERE

18. What is the world record for the greatest number of snorts in 10 seconds? HERE

19. How long would it take to grow your hair to your feet? HERE

20. 20. What number causes the greatest loss of money in the world? HERE

April 12, 2021

## Isaac Newton, The Great Plague and how he filled in his Time!

March 18, 2020

I am grateful to Jeff Jacoby and his column, for reminding me of how Isaac Newton filled in his time when he went into self-isolation during The Great Plague of London in 1665-1666.

He spent time thinking and the results were astounding!!!!!

## Make a Cool Pattern with x2 Tables… but it is trickier than you think.

September 6, 2019

## A COOL MIDDLE SCHOOL MATH EXERCISE

This idea comes from Burkard and Giuseppe @ the fabulous MATHOLOGER channel. Students can make a pattern called a cardioid that pops up all over math according to Burkard.

Follow these steps. There is a pdf file below the first diagram for printing exercise sheets.

And then watch the MATHOLOGER video for a really interesting explanation.

x2 Tables on a Circle pdf file for printing

This circle graph blank could also be used for x3 and x4 tables, which produce totally different yet equally amazing patterns.

Halfway there, now it gets tricky. +52 to each point on the circle and keep multiplying by 2.

ie. 27 x 2 = 54, 28 x 2 = 56 and so on.

so 0 = 52, 1 = 53, 2 = 54, 3 = 55, 4 = 56 etc

This shape is called a CARTIOID.

May 14, 2019

# 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:

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.

May 14, 2019

# Grizzly Bear

Weight:   250kg

Height:   250cm

Top Speed: 56kph  =   16 m/sec

More bear stats here.

# Brown Bear

Weight:  680kg

Height:   250cm

Top Speed: 35kph  = 10m/s

More bear stats here.

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

# Usain Bolt:

Top speed: 243kph =   12m/s

So Usain Bolt could out run a Brown Bear but NOT a Grizzly!

# Bears are NOT as dangerous as:

In fact more Americans die choking on their own vomit each year than a re killed by bears.

More death stats here.

But bears are very fast so Park Rangers recommend the following survival tactics:

More bear survival info here.

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

## 41 Maths things to do before you’re 12

March 25, 2019

A growing body of research shows us that outdoor play leads to better physical and mental health, has positive effects on cognitive function and learning, and reduces the incidence of behavioural problems.” Maria Zotti, Nature Play, SA.

Peter Dunstan, Principal Kilkenny PS, SA, writes in SAPPA magazine, Primary Focus, that outdoor play fosters “wonderment, independence and freedom” as well as “social skills, imagination, creativity and problem solving”.

Inspired by SAPPA and NaturePlay,  Mathspig has produced her own outdoorsy maths list:

References:

9. You can measure the volume of your lungs by blowing one breath into a balloon and pushing it into a full bucket of water. Measure the overflow.

21. Light intensity links. Here and here.

March 1, 2019