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Blog Support for Growing Mathematicians

Archive for June, 2013

Great Galloping Galaxies – Saturn Has Hexagons!

June15

What is making the solar system’s largest polygon? First discovered in 1988, researchers have reproduced the physics of the hexagon in a lab only recently. But they still can’t tell us what is creating the environment required to generate the hexagon, which is shown here forming over the storm-laden north pole of this unusual planet […]

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Math analyses car running costs for gas vs electric

June15

Let’s get the teenage emotion out of the way for a minute and look at the facts. Are electric (and hybrid) vehicles any cheaper to own over, say, a 60 month loan period? More info here!

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How to find the gradient of a vertical line

June14

Many students struggle to figure out what the gradient of a vertical line is. Here is one explanation:

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Zero is the hero!

June13

Zero is a really important concept in Math and has been mentioned earlier. A number of high school students still struggle with the concept of zero. This little movie from NASA simplifies the concept down to…well, almost zero! Chick on it to play – after all, you have zero to loose!

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The World is an Integer?

June10

Try reading this gauge without a few Integers! Follow up question: Is 0 (zero) an Integer? (see Post Support for the answer). And, here is an interesting quote on Integers;

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Bart’s Dog Knows a few Angles

June10

The blog slowed down a little over this long weekend but, even on holiday, I simply cannot resist seeing something mathematical around me. Take this dog pic for instance. Taken on the Gold Coast on Saturday morning, it shoes Bart’s dog chasing a ball thrown by Melissa and Chelsea (our two young mathematicians). A is […]

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$1,000,000 to Solve a Maths Problem

June7

“He dropped out of University, but Texas billionaire D. Andrew Beal has always been fascinated by numbers and the theories behind them. Now Beal, who, with a net worth of $8 billion ranks 43 rd on the Forbes list of U.S. billionaires, is offering a $1 million reward to anyone who can solve a math problem that Beal […]

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Triangles in Everyday Life

June3

We find triangles all around us – whether in construction, surveying, flight paths, bridge design or in fabric shapes and tiles. This picture shows a clever use of equilateral triangles on a building in Brisbane city. You can find 38 jobs that use congruent triangles here! Find out more about the properties of triangles with […]

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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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