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Blog Support for Growing Mathematicians

Archive for November, 2013

Dad enjoys his kid’s great math grade

November30
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Leave Math out of the Equation?

November27

For some different perspectives on Mathematics by Miss USA contestants…

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Lightning and Lotteries – What are the odds?

November23

The Mathematics of Probability is a fascinating one, and every day we take our chances in a variety of different situations (actually, some of our students take big chances every day, simply by running around corners without looking!). Impossible means a probability of 0; while certainty is a probability of 1.0 – that is, every […]

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Build your own Koch Snowflake

November21

The Koch snowflake is a mathematical curve and one of the earliest fractal designs to have been described. It is based on the Koch curve, which appeared in a 1904 paper titled “On a continuous curve without tangents, constructible from elementary geometry” by the Swedish mathematician Helge von Koch. (Source: Wikipedia). The Koch snowflake can be constructed by starting with an equilateral triangle, then recursively […]

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Flipping out on Maths – with Pancakes!

November19

Jacob E Goodman, a mathematician at the City College of New York, recently celebrated his 80th birthday. You probably don’t know him! Perhaps you also don’t know him by his pseudonym, Harry Dweighter. Confused? Wondering why a mathematician needs to disguise his identity? Here is the explanation from The Guardian: “Around 1975, Goodman was at […]

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Mathematics Puzzles

November19

I don’t know about you, but solving puzzles is great mathematical fun, including the logic ones. This site by Maths is Fun has a range of great puzzles for you to try in your spare time!

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Getting Basic Algebra Skills with Dragon Box

November18

“This app is absolutely fantastic at teaching the fundamentals of algebra. I was surprised at how quickly my 7 year old progressed from avatar like dragons to negative numbers and pro numerals. Now to get my class onto this great app.”

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Learning Formulae is just Brain Clutter!

November16

The student just wants to learn the formula and use this to get a correct solution and an “A” on their report. But, is this really learning? This article, from The University of Utah Math Department provides a compelling reason to NOT learn the formulae (or, “At least not rely only on learning the formula“- […]

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How to improve in Math Class

November14

Here are 7 golden rules for improving in your Mathematics at school. The most important one is to Pay attention in class. If you aren’t listening to the teacher, how will you possibly learn the math and pass the tests? Duh! That’s why it’s important to pay attention to the teacher when he or she […]

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Mathematics helps design wind turbines

November11

Mathematics contributes in many ways to the process of converting wind power into usable energy. For example, mathematical weather models are used to find suitable locations for wind farms, while other models specify how to place individual turbines within a farm. Finally, Mathematics (through the use of fluid dynamics) describes air flow and drag around […]

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Rubik’s Cube answer = 43 Quintillion

 

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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