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Archive for June, 2012

Maths in the Movies

June26

Yes, Mathematics has been in lots and lots of movies. Check out the list by clicking on the image here:

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TED Maths Talks

June26

Enjoy a wide selection of inspiring Mathematics talks at TED:

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Great Global Collinear Connections!

June25

Yes, you saw it first here…today’s visitor locations lined up near perfectly. Points that are on a straight line are called collinear. Today’s points did exactly that. Well done, visiting mathematicians! In Geometry, collinear points have the same gradient between any two points on the same line.

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√5 – Why leave your working in Surd Form?

June25

A good follow up question to the last post. A really good reason to leave working in surd form (that is, with the root sign rather than the decimal) is to avoid doing calculations. But a much better reason is to do with the nature of irrational numbers – it is much more accurate to […]

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Irrational Numbers are the never-stay-still numbers!

June24

Yes, irrational numbers are encountered in junior high school. These are like those friends of yours who never stay still in one place. Our mathematical definition is that irrational numbers have decimal expansions that keep on going. They are not rational numbers that can be shown as a simple fraction (one integer divided by another […]

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Can Creativity in Maths be Learned?

June23

Can creativity be learned? A new study of high-school pupils and math teachers presented recently at the Fourth Conference of Education of the Gifted at the University of Haifa found that two creativity traits can be improved during the learning process, while there is one that a person is – or is not – born with. Two traits of […]

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Those pesky times tables again…

June23

MATHS heads a back-to-basics curriculum revamp in Government proposals we told you of yesterday, under which pupils will be taught mental arithmetic, fractions and times tables from age five. Here a TV maths expert explains why she backs the plans.  Elementary maths is so important — especially now. You need maths to go on to […]

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Playing the Millionaire Game with Mathematics

June21

Here is a great little Maths game site which is an excellent one for the classroom or for junior students to try out at home and improve their Mathematics at the same time. Comes from Woodlands Primary School in the UK:

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What story is this graph telling?

June21

A great way to think about graphs is to ask students, “What story is this graph telling”. This is a better than saying, “Describe this graph information”, etc. So, what story do you think this graphic is telling about earthquakes in east and southern Australia?

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Topology – It has two sides but only one!

June21

Students may not have seen much about Topology while their heads are deep inside equations and trig functions. However, Mobius strips and Klein bottles are intriguing aspects of the area of Mathematics called Topology (literally, “the study of shapes”). Here is a Mobius Strip: The fun part of Mobius Strips is that students can make […]

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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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