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Blog Support for Growing Mathematicians

Archive for November, 2019

Best Online Math Tutor

November30

https://www.khanacademy.org/ Khan Academy is one of the best-known online learning platforms for school students from classes 5-12. Founded by a Harvard graduate Sal Khan, Khan Academy has attracted funding from the Bill Gates Foundation because of the high-quality courses it offers to students. The Math courses on the site are easy to understand and explain […]

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Can you Find the Algebra Exam Error?

November25

In a Level 2 Algebra Exam, held in New Zealand recently, students (and teachers) were flummoxed by some of the questions. Can you spot the error in this one? (Answer in Blog Support shortly)?

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A Fishy Puzzle

November20

Here is the challenge with this puzzle – turn the fish around by moving just 3 matches and with no overlapping.

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Galloping Galaxies – Pt III – Mass vs Size

November20

“Size matters!” How often we hear that quote. But does it? Perhaps mass matters too? Jupiter is the largest planet in the solar system. In terms of mass, Jupiter dwarfs the other planets. If you were to gather all the other planets together into a single mass, Jupiter would still be 2.5 times more massive. […]

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Math Fun in the Urban Jungle – A Tale of More than Two Cities

November18

Glen Whitney stands at a point on the surface of the Earth, north latitude 40.742087, west longitude 73.988242, which is near the center of Madison Square Park, in New York City. Behind him is the city’s newest museum, the Museum of Mathematics, which Whitney, a former Wall Street trader, founded and now runs as executive […]

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Zero Has a New Hero

November16

London (2017): An ancient Indian manuscript, dating back to the third century, has revealed the oldest recorded use of ‘zero’ – pushing back one of the greatest breakthroughs in the history of mathematics back by over 500 years, Oxford scientists say. Bakhshali manuscript was found in 1881, buried in a field in what was then […]

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The Beauty of Mathematics ….

November14

“Beauty in Mathematics is seeing the truth without effort”  – George Polya View more images here

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Putting a spring into your Math journey

November12

If your class did well on their last math test, does that mean you are a smart class, or does it mean that the test was easy? Well, that might not be easy to answer, but here is a video that will explain how forces work with springs, and that might put a spring in […]

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Girls = Boys in Math, at least in the early years

November11

There’s new evidence that girls start out with the same math abilities as boys (source: npr.org). A study of 104 children from ages 3 to 10 found similar patterns of brain activity in boys and girls as they engaged in basic math tasks, researchers reported Friday in the journal Science of Learning. “They are indistinguishable,” […]

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Reflecting on Pi

November5

Learn more about Reflection here!

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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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