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Blog Support for Growing Mathematicians

Archive for October, 2012

Music Helps You Learn Maths!

October23

Listening to music in maths lessons can dramatically improve children’s ability in the subject and help them score up to 40 per cent higher in examinations, a new study has found. More details here  

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12kb of Memory and only weighs half a tonne!

October21

The world’s oldest computer has been rebooted by two dedicated engineers who have spent nine years bringing it back to life. The ICT1301 computer, known as a Flossie, measures 20ft by 22ft, and was originally used by London University to organise the grades of A and O-level exam results and print certificates. The computer has […]

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Without Mathematics you would be living…

October21

… in the middle of nowhere! (PS: can you use your atlas and dividers or compass, along with the signs above, to work out where the middle of nowhere is located?)

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Celtic Number

October20

Click here to hear the spontaneous rendition of CelticNumber5

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Virtual Manipulatives for Great Maths Learning

October19

Check out the excellent range of online tools at the National Library of Virtual Manipulatives for helping you gain confidence at a range of Maths problems, suitable for K-12.

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Inside the Data Centers

October18

Click on the image to have a tour of Google’s labyrinth of amazing data centres. You can do the math!

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Connecting with Mathematics

October17

How do you determine the amount of fuel needed to fly a jet? What’s the best use of resources in the armed forces? How do you tile a sphere with squares? Mathematics provides the key. If you enjoy problem-solving and thrive on logic, then studying mathematics will really appeal to you. As one of the […]

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Solving Sudoku with smarter Maths Algorithms

October17

Toroczkai and Ercsey-Ravasz have proposed a universal analog algorithm that is completely deterministic (no guessing or exhaustive searching) and always arrives at the correct solution to a problem, and does so much more quickly. Read more here in Science Daily.

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Maths Goes Faster than Light

October14

SYDNEY: New mathematical formulas have expanded Einstein’s theory of special relativity to allow for travel beyond the speed of light, potentially changing the way we view the Universe and judge distances. Read more here.

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Transformation Geometry – Pt I

October13

When we look into a mirror we see an image of ourselves. But, pull on your left ear and your image is pulling on your right ear! What has changed? The order of objects on your face have changed in the mirror image, but not the size of your face or the distance you are […]

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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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