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Posts tagged with nrich

Thinking Mathematically!

August15

What a mental adventure mathematicians have! Questioning, visualising, exploring, reasoning, justifying, thinking, questioning, problem-solving, representing and modelling! These are all aspects of thinking mathematically. Click on this link for more information and examples from nrich maths.

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Practical Maths Modelling

November11

This nrich site (a star favourite in our blogroll) offers some excellent practical mathematical problem-solving with a sporting focus. These activities are based on maths normally encountered while studying at A-level in the UK (ages 16 to 18). These types of questions are really important for our growing mathematicians.

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Numbers in Mathematics

July22

Which lead to a post on Square Numbers. These are numbers which are the squares of 2,3,4,5, etc. Therefore, the set of square numbers will be; 4,9,16,25,36, etc. Which can lead to some interesting discoveries… Click the pic above to investigate this idea and click here for more number ideas and links from this excellent maths […]

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Post Support

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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