## Posts Tagged ‘%’

July 19, 2019

**Discovery Magazine: **Home Made Ice Cream

More ice cream science: the scoop baking

Posted in %, Ratio **|** Tagged %, air, bubbles, cheap, funny, gourmet, ice cream, joke, Math, melts, names, percentage, ratio, volume, Weight **|** Leave a Comment »

February 18, 2019

The follicle diagram (above) came from bgoffforensics blog. More on hair growth rates here.

**QUESTION 1:**

## How long to grow that really bad 70s style hair cut?

The length of Fabio’s hair (below) is approx 50cm.

t = 50/1.25 months

t=40 months

## t = 3 Years 4 months!!!!

## Is it worth the effort? Ha!

**QUESTION 2: **

The growth rates of 1.25 cm/month or 0.5 inches/month are rounded off. Calculations using these growth rates will produce different answers for very large numbers (as above). Read more about the above story in the Daily Mail, UK here. By the way, Asha has been growing her hair for 25 years. Her hair weighs 3 stone or 19 kg. You can find more hair records including the World’s longest ear hair here.

**QUESTION 3:**

Natasha lives in Rio de Janeiro, Brazil. Read more about Natasha in the Daily Mail here. Once again Mathspig has rounded off the length of hair for easy calculation. The Daily Mail puts Natasha’s ‘mane’ at 5 feet 2 inches or 157 cm. This is the length of hair to be cut off. So Mathspig adjusted the length to 180cm or the approx length of her longest hair.

Posted in %, 10 MATH JOKES, decimals, units length, Year 7 mathspig, Year 9 Mathspig **|** Tagged %, 1970s, 1980s, calculation, dreads, funny, growth, hair, haircuts, length, Maths, old, rate, ugly, world record, worst **|** Leave a Comment »

January 10, 2019
Here are just a few of the popular disaster movies:

**Avalanche **(2001),** Earthquake **(1974)**, Armageddon **(Involves meteors 1998),** Deep Impact **(More meteors 1998),** 2012 **(Tsunamis, earthquakes, the lot. 2009)**, Twister **(tornadoes 1996), **Backdraft **(Fire. 1991) and** Towering Inferno** (They don’t make thunderous movie titles like that anymore. (1974)

But what percentage of people involved in, say, an explosion suffer from SHOCK! There are many statistics about Post Traumatic Stress Disorder (PTSD) available. In **one excellent study** in The National Centre for PTSD Journal involved an explosion in a paint factory in Norway (1976), the 246 employees were ranked for their exposure to shock as follows:.

A. 66 Narrow escape

B. 59 Involved but not in danger

C. 121 Not present on the day.

80% Group A suffered shock and PTSD. Both Groups A & B showed symptoms of PTSD 7 months later. If, say, a plane crashed into your school sports field and your class survived with minor injuries calculate how many students in your maths class would go into SHOCK and how many would be left to take action using the above statistics.

These stats can also be used as a fraction or decimal exercise using 0.8 or 4/5 as the fraction of students in shock.

More information at the** Health Dept WA**

NOTE: Many schools in Australia today not only practise fire drills but terrorist attack lockdowns.

Posted in %, 10 Movie Cliches Debunked with Maths, Fractions, Hollywood Maths, Junior School, Middle School, Year 7 mathspig, Year 9 Mathspig **|** Tagged %, alien invasion, Armageddon, calculate, decimals, disaster, exercise, fractions, Math, Middle school, movie, real life, shock, symptoms, Twister **|** Leave a Comment »

May 27, 2018
Posted in %, 10 Mentalist Maths Tricks, Junior School, Mentalist Maths, Middle School, Year 7 mathspig, Year 9 Mathspig **|** Tagged %, 10 Math Mentalist tricks, calculate, classroom, crazy, end of year, entertainment, Fun, Math, mentalist, Middle school, psychic, spooky, stunt, trick **|** Leave a Comment »

July 10, 2015

**Hellooooo My Little Sweeties,**

**There is so much maths you can do with m&ms, it’s hard to believe there is any other sort of maths.**

**You can study:**

**Counting, times tables,** **set theory,** **Bar graphs,** **Fractions, % and decimals**, **Mean, median, mode, ****and parabolas (using a really cool peg-powered catapult).**

**But my favouritest ,developed by Patrick Len, is using m&ms to demonstrate half life in radioactive substances and therefore write an exponential equation.**

**m+m ACTIVITY:**

**Throw a fixed no. m&ms on a table. Mathspig chose 128 m&ms for a very good reason. Eat the ones with the m showing. Count remainder. Throw again. Eat the ones with the m showing. Count remained. Keep doing this. You will end up with results like the following. (Not identical as chance is involved)**

**Wow! m&m’s and exponential equations. How yummy is that!!!!!!**

**More yummy maths:**

**m+m maths 1: find the volume using m+ms!**

**m+m maths 2: Guess, NO, calculate the number of m+ms in a jar!**

**m+m maths 3: how many m+ms will kill you?**

**m+m maths 4: How many m+ms will kill my dog?**

**m+m maths 5: how many m+ms will kill my cat?**

**m+m maths 6: How many m+ms will kill my pet rat?**

**m+ms maths 7: how many m+ms will kill my pet mouse?**

**Mmmmmmm! Can’t talk. Face full of chocolate.**

**Bye bye**

# Mathspig

Posted in %, 7 m+m maths challenges, algebra, Arithmetic, Averages, base 2, decimals, Exponential Functions, Middle School, Parabolas, Units Volume, units weight, Year 7 mathspig, Year 9 Mathspig **|** Tagged %, activity, algebra, back to school, bar graphs, exponential fn, fractions, Fun, m&m, Math %, mean, median, project, radioactive half life, volume **|** 1 Comment »

June 25, 2015

#### You can find more Death by Chocolate Maths here and here.

Posted in %, 7 m+m maths challenges, algebra, decimals, Middle School, units weight, Year 7 mathspig, Year 9 Mathspig **|** Tagged %, algebra, calculate, chocolate, decimals, enrichment, Fun, kid, kill, m&ms, Math %, Middle school, poison, project, you **|** 2 Comments »

June 22, 2015

#### You can find more Death by Chocolate Maths here and here.

Posted in 7 m+m maths challenges, algebra, decimals, Junior School, Middle School, Units Volume, Year 7 mathspig, Year 9 Mathspig **|** Tagged %, Algebra fun, calculate, decimals, dog, Fun, gambling equations make big bucks, how many, kill, m&ms, Maths, Middle school, project, Simple Algebra, Weight **|** 2 Comments »