Welcome to H3 Maths

Blog Support for Growing Mathematicians

Archive for July, 2021

Fun with Grapher

July31

If you are on an Apple device, look for the app called Grapher under the Applications–>Utilities folder. Choose 3D and type in anything that you think will make an interesting graph. You can use the ^ key to make powers. You can also animate your graph to see its shape change. Very cool and very mathematical! […]

by posted under Uncategorized | tagged under , , ,  |  Comments Off on Fun with Grapher

Looking at buildings can produce headaches. Math explains why.

July31

“It’s three o’clock. You’re at work, struggling to focus during the afternoon lull. You gaze out of your office window, hoping for some relief, but instead you feel a headache coming on. Flat gray concrete lines the streets, while windows form repetitive glassy intervals in stark brick walls. With monotonous straight lines as far as the […]

by posted under Uncategorized | tagged under , , , , , , ,  |  Comments Off on Looking at buildings can produce headaches. Math explains why.

Another Great Book for Math Teachers

July23
by posted under Uncategorized | tagged under , ,  |  Comments Off on Another Great Book for Math Teachers

Jeff Bezos and passengers lift off into space with no pilot!

July22

Jeff Bezos and his fellow passengers rocketed into space, coinciding with the day in 1969 when Neil Armstrong became the first man to walk on the moon. What an achievement! Get this—a current iPhone seven million times more memory than the guidance computer on Armstrong’s spaceship and over one hundred thousand times its processing power.

by posted under Uncategorized | tagged under , , ,  |  Comments Off on Jeff Bezos and passengers lift off into space with no pilot!

Free PPT on History and Exploring Pi

July10

Pi is one of the main attractions inside the Secret Garden of Mathematics. Pi is delightful, mysterious, simple, yet profound. Pi contains the name of the person you will marry, where you will live and, perhaps, your favourite song. Share this free ppt with your teacher or with your class. Change it to fit the […]

by posted under Uncategorized | tagged under  |  Comments Off on Free PPT on History and Exploring Pi

Quitting Maths can Affect Teens’ Brains

July4

For some teenagers, dumping maths from their school schedule is something that can’t happen quickly enough. However, new research out of the University of Oxford (see full report here) shows that quitting maths at age 16 may have an adverse effect on brain development, while teens who stick with maths at A-level (Year 12) have […]

by posted under Uncategorized | tagged under , ,  |  Comments Off on Quitting Maths can Affect Teens’ Brains

Concrete: The material that’s ‘too vast to imagine’

July4

A recent BBC article predicted that, if its rate of growth continues, concrete will overtake the total weight of Earth’s biomass sometime around 2040. Try to picture that in the mind’s eye: there is a day approaching soon when there will be a greater weight of concrete on Earth than every single tree in every forest, every fish […]

by posted under Uncategorized | tagged under , , , ,  |  Comments Off on Concrete: The material that’s ‘too vast to imagine’

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)?]

Archives

H3 Viewers



Skip to toolbar