Johnny and Mary Do Maths
Secondary Mathematics
Saturday, April 20, 2013
Visualisation versus Algebra?
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Here is a Primary 5 (Grade 5) word problem from Yan Kow Cheong in Singapore: There are 100 chickens and rabbits altogether. The chickens...
Wednesday, February 27, 2013
An Introduction to the Vector Equation of a Line
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Given two different points we can always draw a line segment between them. We can also sketch a line given just one point and a directio...
Saturday, February 23, 2013
The Pentagram
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The pentagram is an ancient symbol ( http://mathworld.wolfram.com/Pentagram.html ) , recently popularized by Dan Brown ( http://www.danbro...
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