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Archive for June, 2014

The Magic of Numbers

June13

It is not known who created this magic square, but it is shown in Durer’s famous 1514 engraving, known as Melancholia. What is quite remarkable about this square is that: 1. All the rows, columns and the two diagonals add up to the same number, just like ordinary magic squares. In this case the number […]

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How did a 6th Grade Math Teacher become a top golf caddy?

June11

Yes, dear mathematicians, there is a game that resembles math – not just because it involves numbers, but also because it takes a certain mental attitude that can only be developed in the math classroom. So, how did teaching math to sixth-graders in Puget Sound lead to being the caddie for the No. 10 player […]

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How many mathematicians to change a light bulb?

June9

Check the post support for the answer!

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A math professor’s words on life’s conundrums

June9
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Measuring to the nth degree…

June3

Researchers in Australia have developed the world’s most sensitive thermometer—and it measures temperature with a precision of 30 billionths of a degree using the properties of a circle! Read the article here.

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FemMath – where fewer run away!

June3

Recent research has shown than people are slightly less likely to flee an oncoming storm with a feminine name than a masculine one. Researchers found that hurricanes with feminine names turn out to be deadlier than their more macho-sounding counterparts, possibly because the feminine names sound less dangerous. For example, the two deadliest storms to […]

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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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