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Archive for November, 2011

Revision of Equations – Solving with variables on both sides

November28

Check out this equation revision test on IXL, and have a look at the other great topics to be found on this excellent site (up to Year 9 at present)

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Maths Connections

November28

What do Gollum, the new Olympic stadium that’s being built in London and the quest for sustainable energy have in common? Check this link for more details!

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The Battleship Game (for long road trips)

November28

The following template can be used to play “Battleships” which is a variation on the board game that has been around for ages. The beauty of this version is that it uses car number plates to initiate each <attack>. You can modify the game to suit your own situation. let us know how it goes […]

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The Mazda Pi – taking mathematics to a highway near you!

November28

I grew up with Mazda cars and loved the fact that they were so well designed by engineers – which is why most work could be done with just an 8mm and 10mm spanner! Since then cars have become more complicated, with important drive functions controlled by computers. So, why not extend the old Mazda […]

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Faster than light? Hold your atomic horses, I don’t think so!

November25

Here is an update on the “faster than light” experiment which has caused such a stir in the scientific community. The comments on this link are interesting to read as well.

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The Train Problem

November23

Two identical trains are traveling around the equator – one from west to east and one from east to west. Which train is the heavier?

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Post Support

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)?]