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Archive for February, 2013

Iditarod Activity Sheet for Middle School

February28

I have included an activity sheet for Year 8 or 9 students to help them take a mathematical interest in the Iditarod Race, and also use Excel to sort and graph the mushers. Click on or download Using the Iditarod Race as a Teaching Tool in Mathematics.  

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Mathematics of Planet Earth

February26

This global Mathematics event starts in Paris in March. Click on image for details:

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Elapsed Time in the upcoming Iditarod – the Last Great Race!

February24

Follow these students as they learn about Elapsed Time in Mathematics, based on the Iditarod Race, which starts in Alaska in March:

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When 2 can sometimes = 1

February24
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A Restful Part of a Right Triangle

February22
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Math Images Gallery, etc.

February20

Check out these popular and sometimes unusual Math Images, each of which is arranged by Mathematical topic, complete with more detail:

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Maths Professor improves mirrors!

February19

  A side mirror that eliminates the dangerous “blind spot” for drivers has now received a U.S. patent. The subtly curved mirror, invented by Drexel University mathematics professor Dr. R. Andrew Hicks, dramatically increases the field of view with minimal distortion. (Note: the improved mirror is the top one in the picture above). Hicks’s driver’s side […]

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Graph Interpretation

February17

Here is a challenge. Can you work out what information is being displayed in this graph? In a previous blog we talked about the fact that every graph tells a story. Of course, sometimes the story is not very clear or obvious but, as a mathematical sleuth, you can make some guesses! Click on the […]

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Student Success in recent Math Competition

February17

  Hillsborough High School tied for second place with math rival East Brunswick in one grouping of the 37th annual statewide math competition sponsored by the Association of Mathematics Teachers of New Jersey (AMTNJ). Hillsborough tied for second in the Gamma Division, which consists of schools with more than 1,250 students. Along with thousands of students around […]

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Some Common Math Terms

February16
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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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