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Archive for April, 2013

21st Annual Maths Team Challenge

April30

Below is a pic from one of the regional Mathematics Team Challenge, held across Queensland for the 21st time. Over 700 students took part (in year level teams of 5) in this one today for schools in northern Brisbane. The challenge features two events – a team category where each group work collaboratively through 10 […]

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10!

April30

Yes, iTunes is celebrating its 10th birthday! Click on the image to see a timeline of the incredible growth of this onine music phenomenon. The stats are staggering! On 28th of April, 2003 Apple launched the iTunes Music Store with just 200,000 songs. The launch of iTunes also tapped into a pent-up demand for digital […]

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New Device measures fun!

April27

Who said that statistics were boring? Check this cool gadget out… “A rugged activity tracker that purports to ‘count fun’ (not calories) and measures movements unique to action sports like surf, skate, snow, moto, MTB, BMX, and the likes. It’s built to withstand snow, surf, dirt, and hard pavement knocks and is a modular device […]

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Working with variables – Pt I

April26

This important post is a repeat of an earlier one, with a few small changes. Get this math concept right and you will be doing accurate Mathematics! When working in Algebra (like any other work) you need to follow the rules to get it right. This sounds simple and, with a little practice, it is!! […]

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Global Data heats up…

April24

From 1971 to 2000, the world’s land areas were the warmest they have been in at least 1,400 years, according to a new study inNature Geoscience. The massive new study, involving 80 researchers from around the world with the Past Global Changes (PAGES) group, is the first to look at continental temperature changes over two […]

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Australia Welcomes the 23rd Million…

April22

It was a big night for Australia last Tuesday. According to the Australian Bureau of Statistics’ population clock, just after 10.15pm someone stepped off a plane or a baby was born to become the 23rd million Australian. Baby 23,000,000, you have won the equivalent of the global lottery by being born here.  Using quarterly demographic updates […]

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Where was the ancient capital of Mathematics?

April21

Modern theoretical mathematics is a complex and abstract field. It frustrates and annoys secondary school students in math classes, but also provides the basis for all the technological wonders we enjoy today. Without the incredible mind of a 8th century Muslim mathematician, al-Khawarizmi, the world of math today would look vastly different. But where did […]

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Meaurements lead to archaeological find

April21

The structure is comprised of basalt rocks, arranged in the shape of a cone. It measures 230 feet (70 meters) at the base of the structure, is 32 feet (10 meters) tall, and weighs an estimated 60,000 tons. It is twice the size of the ancient stone circle at Stonehenge in England.  What is it? […]

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Using Inverse Operations to Solve Equations

April17

This useful youtube video gives a simple introduction to using inverse operations to solve some basic equations:

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How to Stay Awake in Class – 4 Tips!

April17

Yes, it is tough out there in your math classes. The main problem? Trying to stay awake!! Here are four tips to help you:     1. Bring your attention back to the subject: Do yourself a favour and minimise your distractions beforehand to give yourself the best possible chance of focusing on the lecturer or […]

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« Older Entries

Post Support

Largest number between o and 1 million which does not contain the ‘n’ is 88

 

Rotation SAT Problem: Answer: 4 (see: https://www.youtube.com/watch?v=FUHkTs-Ipfg)

 

Which number has its letters in alphabetical order? Answer: F O R T Y

Hidden Rabbit? Clue: check the trees

How long for the stadium to fill? 45 minutes.

Where are you? the North Pole

Prize Object Puzzle: If Sue does not know where the prize is in the first question, it can’t be under the square. She must have been told it is under another shape. Apply this same logic to Colin. It is then obvious that the prize cannot be under a yellow object. That helps Sue eliminate her yellow shapes. Got the idea?

Algebra Puzzle: Answer = 1

Popular Math Problems Answers: 1, 1

Number of tabs? According to Lifehacker, the ideal number of tabs you should have open is nine. Yes, a single digit. To some, this is like playing a piano and only using a fraction of the notes!

Worst Graph? Where to start. What a visual mess and even some of the lines merge and are impossible to follow. A graph is a visual display of data, with the goal to identify trends or patterns. This is a spider’s web of information which fails to show a clear pattern at all. Solution? Well, different colors would help, or why not group in two or three graphs where trends are similar?

Number of different nets to make a cube is eleven – see this link

Homework Puzzle; The total value of the counters is 486, so halve this to get 243. Now, arrange the counters to equal this amount twice.

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)?]

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