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Archive for July, 2024

Top Teacher Helps Students Online

July21

Subash Chandar has been awarded the National Excellence in Education Award (NZ) for his inspiring work as a Mathematics and Statistics teacher. You can check out his youtube channel here at ‘infinityplusone’: https://www.youtube.com/@infinityplusone  

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The mysterious maths at work in the Tour de France

July17

An interesting article from the BBC, written by Kit Yates, Director of the Centre for Mathematical Biology at the University of Bath and the author of The Maths of Life and Death, and How to Expect the Unexpected If you look at where previous winners of the world’s most famous cycling race are from, a surprisingly common […]

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Pi, Whichever Way You Look at it…

July11
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Chance Discovery of Random Number Generator

July7

[Article source: BBC] In 1997, Mads Haahr and his pals were nosing around a Radio Shack outlet in Berkeley, California. Most of the radios on sale had noise filters that cut out the crucial crackles they were looking for. After a little persuasion, the salesman agreed to let Haahr and his friends listen to one […]

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Turbulence and Probability

July7

Definition: The Federal Aviation Administration describes turbulence as “air movement that normally cannot be seen,” noting that it often occurs unexpectedly. While planes are built to withstand turbulence, it may still be an uncomfortable experience for passengers. Massey University’s School of Aviation (New Zealand) chief executive Ashok Podavul has over 12,000 hours of airline jet […]

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Post Support

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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