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Archive for January, 2019

Which number is the odd one out?

January27

These talented young dancers are doing a routine for a judge – who will score them using their numbers. Above them are two more numbers, making the sequence 5, 7, 2, 5 or (top to bottom) 7, 5, 5, 2. My students enjoyed coming into class and, when seeing four numbers on the board, trying […]

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Game on! Why Math Matters

January26

“Math is not something we create … it is something we discover …” This quote is from “Game on! Why Math Matters” – a 55 minute video to inspire students to discover Mathematics. Filmed at the famous Mohonk Preserve in the Shawangunk Mountains near New York, the message to students is, “You often have to […]

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A Visual History of Mathematics

January22
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5 Brilliant Mathematicians who impacted the modern world

January17

“Mathematics – you either love or hate it, right? Those who hate math might still have nightmares of showing up for a high school math test unprepared, even years after graduation. Math is, by nature, an abstract subject, and it can be hard to wrap your head around it if you don’t have a good […]

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Still Reaching for the Moon at 100 years of age!

January10

Katherine Johnson, the now-retired NASA computer whose work on early human spaceflight milestones was highlighted in the blockbuster movie “Hidden Figures,” will publish an autobiography for young readers in September 2019 called “Reaching for the Moon.” Now 100 years old, Johnson joined the government agency that later became NASA as a human computer in 1953. […]

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Math attitude predicts math altitude in new study

January5

January Math News: “For the first time, scientists have identified the brain pathway that links a positive attitude toward math to achievement in the subject. In a study of elementary school students, researchers found that having a positive attitude about math was connected to better function of the hippocampus, an important memory center in the […]

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The Size of Space is Remarkable!

January3

Ultima Thule is more than a billion miles on the far side of Pluto. This snowman-like space rock is approximately twenty miles long by ten miles wide and seems to spin like a propeller through space. Why? It is two objects fused together in a strange motion. The object was discovered by the Hubble Space Telescope […]

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Should I learn the formula or the method?

January2

Two students are given a problem in mathematics. One memorizes the formula because that’s easier for the moment. The other learns the principle, even though that’s harder at the time. But when the test comes, one student is working much harder over things the other one understands and enjoys. Guess which one ‘understands and enjoys’? […]

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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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