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Archive for September, 2020

Time for Time Travel?

September29

Hold onto your flux capacitors! A young University of Queensland student may never be late for class again – or even early for that matter. He says he has found a way to “square the numbers” and prove that “paradox-free” time travel is theoretically possible in our universe. From Back To The Future to Terminator, stories […]

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Rubik Cube – a colourful creation!

September18

The first person to solve a Rubik’s Cube spent a month strugglingto unscramble it. Erno Rubik was born on July 13, 1944, about a month after D-Day, in the basement of a Budapest hospital that had become an air-raid shelter. His father was an engineer who designed aerial gliders. As a boy, Rubik loved to […]

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Which is Greater – No of Stars or Grains of Sand?

September10

Grains of sand or stars – which is the bigger number? Obviously, grains and stars can’t be counted, not literally. But you can guestimate. Science writer David Blatner, in his new book Spectrums, says a group of researchers at the University of Hawaii, being well-versed in all things beachy, tried to calculate the number of […]

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6 Good Reasons to Like Algebra

September5

1) Algebra is Faster And Better Than “Basic” Math Just as multiplying two by twelve is faster than counting to 24 or adding 2 twelve times, algebra helps us solve problems more quickly and easily than we could otherwise. Algebra also opens up whole new areas of life problems, such as graphing curves that cannot […]

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New Google Tools help with Homework

September4

Socratic was built by Google to support Science, Math, Literature, Social Studies, and more. As one teacher commented, [The app provides] “great exposure to different types of learning materials for students to learn from, as well as teaches students to use multiple sources to draw conclusions for questions or scenarios.” In short, Google have provided […]

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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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