Hi - just a reminder that the February edition of the NRICH website http://nrich.maths.org is up.
This month the theme is Experiment, Conjecture and Prove.
Many of the problems, at all Stages, explore what can and cannot be done with triangles, encouraging younger pupils to develop language which discriminates between forms, and expresses characteristics like symmetry, while pushing older students to grapple with the irrational.
Even thinking beyond two dimensions as a triangular net wraps up some three-dimensional space in Triangular Faces
http://nrich.maths.org/public/viewer.php?obj_id=5943
But it's not all shapes - don't miss 9 Weights,
http://nrich.maths.org/public/viewer.php?obj_id=5827
a challenge to use information efficiently, and then Conway's Chequerboard Army
http://nrich.maths.org/public/viewer.php?obj_id=5882
for a fascinating test of what a system or process will allow.
If you think that mathematical proof is clear-cut and universal you should dip into this article Proof: A Brief Historical Survey
http://nrich.maths.org/public/viewer.php?obj_id=5996
and then see what you think.
There's also the Factors & Multiples Game ,
http://nrich.maths.org/public/viewer.php?obj_id=5468
a great interactive challenge that will stretch your reasoning and strategy-finding ability - be warned, it's easy to get hooked.
Algebra meets sudoku in Equation Sudoku ,
http://nrich.maths.org/public/viewer.php?obj_id=5970
this month's puzzle from Henry Kwok's endless variety of themed Sudoku challenges.
Remember you can:
Go to Stage 1 & 2 http://nrich.maths.org/public/monthindex.php?mm=1 if
you are interested in mathematics at a level usually encountered at
primary school.
Go to Stage 2 & 3 http://nrich.maths.org/public/monthindex.php?mm=2 if
you are interested in mathematics at a level usually encountered at
lower secondary school.
Go to Stage 3 & 4 http://nrich.maths.org/public/monthindex.php?mm=3 if
you are interested in mathematics at a level usually encountered at
upper secondary school.
Go to Stage 4 & 5 http://nrich.maths.org/public/monthindex.php?mm=4 if
you are interested in mathematics usually encountered at post-16 level.
Alternatively, click on the links in the left-hand menu.
Solutions to the February problems will appear in March.
From,
The NRICH Team
--
Graeme Brown
NRICH Project
University of Cambridge
Centre for Mathematical Sciences
Wilberforce Road
Cambridge. CB3 0WA
tel: 01223 764245
mob: 0791 7821 935
url: www.nrich.maths.org
www.mmp.maths.org
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