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Archive for March, 2019

Job Purity …

March28
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Measurement Factoid

March26

DYK (Did you know) – that a typical acre (0.40 hectares) of soil contains 400kg of earthworms, 1000kg of fungi, 680kg of bacteria and 400kg of insects.

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Machine Learning – More Mathemagic!

March24

“When your bank calls to ask about a suspiciously large purchase made on your credit card at a strange time, it’s unlikely that a kindly member of staff has personally been combing through your account. Instead, it’s more likely that a machine has learned what sort of behaviours to associate with criminal activity – and […]

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Powerful Interactive Tools for Learning

March19

Check out the helpful list of six interactive tools for helping students engage with their Mathematics: Six Tools To Create Interactive Learning Content On Your Blog  

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Math is the Best Way to Make Sense of the World

March10

When Rebecca Goldin spoke to a recent class of incoming freshmen at George Mason University, she relayed a disheartening statistic: According to a recent study, 36 percent of college students don’t significantly improve in critical thinking during their four-year tenure. “These students had trouble distinguishing fact from opinion, and cause from correlation,” Goldin explained. She […]

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Shapes

March10

Have you ever wondered why we put a round pizza into a square box and cut it into triangles? Don’t worry – most of us never think about it. But here is the exploration – check out what other shapes pizzas come in and find the most economic design.

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Wow – that’s a heap of tweets!

March2

Six thousand tweets are sent every second, which corresponds to five hundred million tweets a day. Every sixty seconds, 510,000 comments are posted on Facebook. Add the 1.7 billion websites on the internet and the information exchanged on social media sites such as WhatsApp (one billion users a month), WeChat (697 million users a month), […]

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Find x

March1

One of many great Math posters available from redbubble:

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DNA Revisited – Mathematical Proof of Divinity?

March1

A single cell and the DNA that causes it to function is millions of times more intricate than anything man has created. So, is it mathematically possible for us to not be created by a higher power? For illustration purposes, let’s take a 200 page book. Could the cover, the paper, the ink and the […]

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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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