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Archive for November, 2018

A little bit of a puzzle

November23

There are 10 types of people in this world, those who understand binary counting and those who do not. 

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The 25 Horses Puzzle

November23
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25 Blogs for Mathematics in the Classroom

November22

A collection of excellent Math Blogs (Middle to High School with lots of interesting topics)

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Logo City inspires Integrated Learning in Year 9

November21

From a resource at Teachers Pay Teachers called “Building My Block” a Year 9 class used this Porject-Based learning activity to integrate their Mathematics with English and Food Technology. How to go about this activity? 1. Purchase the resource if you are extra keen. Or, 2. Simply make up a template to enable each student […]

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Alien Signals need Math Wizz to Solve

November21

The Warkworth Radio Astronomical Observatory is located about 50 km north of Auckland, New Zealand. It is operated by the Institute for Radio Astronomy and Space Research, Auckland University of Technology. Here is a picture of it: Task 1: Which shape – the parabola (C) or circle (D) best fits the shape of the telescope? […]

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Mathematics Saves Lives

November15

Can Mathematics really make a difference and save people’s lives? Check out this video from ABC Australia…

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Mathematicians talk about their passions

November3
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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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