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Blog Support for Growing Mathematicians

Archive for November, 2012

Ten Ways to Survive the Maths Blues

November14

Yes, just in from Interactive Math – another “10 top tips” – this time to avoid the Maths Blues – you know, that sinking feeling when you just can’t cope with Maths anymore! Click Tip 10 below for numbers 1–>9: PS: This post is dedicated to the three students who turned up to Maths Tutorial […]

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Its a Wonderful World

November13

Check out this amazing TED talk which investigates the mathematics of scale and the beauty of the nano world:

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Math on Tag Galaxy

November12
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Practical Maths Modelling

November11

This nrich site (a star favourite in our blogroll) offers some excellent practical mathematical problem-solving with a sporting focus. These activities are based on maths normally encountered while studying at A-level in the UK (ages 16 to 18). These types of questions are really important for our growing mathematicians.

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Another Day at the Maths Tutorial…

November9

It was after school and three students attended the tutorial session. To give you some idea – these students were across two different year levels and at widely different abilities (at present). I say “at present” because even Einstein was deemed a failure at the age of these students who attended. Anyway, back to the […]

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A Minute 2 Win It

November8

A great way to brush up on your arithmetic skills – 10 questions each day and you (or a fellow student) can choose whether you use multiply, divide, add or subtract for each pair in a row. Great with a class too – so ask your teacher if you can take the class through this […]

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Snow?

November6

Hard to believe that anyone is having snow at present when we are enjoying temperatures in the mid-20s (celcius). Have you had lots of snow? Is your school closed? Has the temperature dropped below freezing? Did you know there are lots of mathematical facts about snow and ice? For example, the average snowflake has a top […]

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Locus of Points – Pt II

November5

This site has a simple applet that illustrates the concept of the locus (path) of moving points:

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Parabola Simulation

November4

Draw a line and a point somewhere away from it. Now, plot points so that they are the same distance away from the (fixed)  line as the (fixed) point that you drew. The shape your points will make is a parabola. Most students in junior high school find this as difficult exercise, simply because they […]

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Maths is like…

November3

…a box of chocolates. You never know what sort of problems you are going to get. Some are easy and some are hard! PS: one student said, “I love chocolates more than Math!”

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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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