## Welcome to H3 Maths

Blog Support for Growing Mathematicians

## Archive for October, 2012

### Big Data = Big Maths

October30

According to IBM we create 2.5 quintillion bytes of data every day – taking pictures, posting, texting, tweeting, typing up docs, making videos, sending GPS signals, swiping credit cards, etc. That is a HUGE amount of data and, as Google has shown us, the control and analysis of much of that data = economic benefit. […]

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### Get your lasers ready – Refraction Begins!

October29

Refraction is an online puzzle game for teaching fractions – aimed at Primary but suitable for Junior High. The game is not obviously a lesson in fractions, but requires knowledge of fractions to succeed. In Refraction, the player must partition lasers in order to power spaceships containing various animals who have gotten stuck in space, […]

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### Maths in Action – Real Estate Commissions

October29

There is an area of mathematics where real estate salespeople are and must be math wizards. What is that area? Figuring out their commissions…It’s a simple enough problem, right? The commission on the sale of a house is usually six percent. Everybody knows that. But wait. There’s more. If the house was sold by someone […]

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### Measuring in Today’s World

October27

“In this increasingly global planet us citizens of the world need to be able to understand terms which are standard in the industry or place where they originated,” explains Will. “Knowing that there are approxinmately 25mm to the inch, 300mm to the foot, that a mile is 1600m, what a 15-inch laptop screen looks like, […]

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### Maths is Australia’s Single Largest Ed Event!

October27

Since 1978 it has become the largest single event on the Australian Education Calendar, allowing students to attempt the same tasks, on the same day in about 40 countries. It has become a truly international event, with countries throughout the Pacific and South East Asia, and some from even further afield taking part. Over 400,000 […]

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### Which USA Presidents needed Mathematics for Success?

October26

This is a really interesting, historical question. Find out the answer(s) here

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### The X Factor in Mathematics

October25

From TED Talks – a definitive explanation for why we use ‘x’ in Mathematics:

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### Alex’s Adventures in Numberland

October25

Math is often called the universal language, and in his new math travelogue, author Alex Bellos takes readers on a journey not only through realms of numerical thought and theory, but around the world as well. His book is already a bestseller in the U.K., under the title Alex’s Adventures in Numberland. You traveled the world to investigate how […]

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### The Fibonacci Furniture Item

October23

Hey, check out this latest mathematical fashion furniture, based on the Fibonacci Series: More info here

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### Translate from English to Algebra

October23

Here are some common examples of translating from English into Algebra: Source website here

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#### Post Support

The graph on the left (Coronavirus) is for a time period of 30 days, while the one on the right (SARS) is for 8 months! Very poor graphical comparison and hardly relevant, unless it is attempting to downplay the seriousness of the coronavirus?

10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]