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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 […]

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)?

A Fishy Puzzle

November20

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

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. […]

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 […]

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 […]

The Beauty of Mathematics ….

November14

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

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 […]

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,” […]

Reflecting on Pi

November5

Learn more about Reflection here!

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Post Support

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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