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Archive for February, 2019

Rise of Computer Power – the Law of Moore!

February28

Ordering a pair of socks online today involves more computing muscle than Nasa had in 1969! In fact, the Apollo Guidance Computer was about as powerful as a slow Nintendo! For more computer power comparisons, click here. Computing power has increased according to a rather unusual law – no, not in-laws or outlaws, but Moore’s […]

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Did You Know … DNA factoid

February25

DNA, the long molecules containing our entire genetic blueprint, are about two metres long when unwound, but pack into cell nuclei that measures only 100th of a millimetre across.

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What do these faces have in common?

February20

A wide variety of faces, yet they all have something in common. What do you think it is? Answer: They are all fake images! How? See this intriguing video which uses an amazing new mathematical facial formula (algorithm). Click on the image to view (approx 6min):

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And a bit of fun for a change …

February20

How many spare parking spaces are in this picture?see Post Support for answer

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A short video to undo math anxiety

February20
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Gold Increases by 300%!

February19

This gold chart (source: Kitco.com) appears to show a dramatic – over 300% – increase in the value of gold over a period of just 7 hours on February 15th, 2019.  Students learning Mathematics and Statistics must exercise their detective instincts when viewing data in graphical form and this is an excellent example. Of course, […]

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Why math if we don’t use it in everyday life?

February9

That’s a very good question and I am going to invite Kedar Marathe – who works at Tata Technologies in India – to answer it: “Look around the world in which you live. Almost everything that you experience and enjoy is possible because of Mathematics. 1. You drive a car. A car company uses CAD […]

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Why do we need quantum computers?

February5
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The Real Math Behind ‘The Simpsons’

February5

So, in relation to my last post, here is a puzzle that appeared in a Simpsons Episode – centered on baseball. Can you figure out the attendance at this game? For a complete explanation, check out this 12min video here.

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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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