The March edition of the NRICH website is now live at
http://nrich.maths.org where our mathematical theme this month is Number.
We have two interactive jigsaws for you to complete at primary level,
one based on the 100 square
one on the multiplication square
<http://nrich.maths.org/public/viewer.php?obj_id=5573&part=index> . If
you would prefer to try the jigsaws away from the computer, you could
always print off the pieces which are also provided for you. For a more
open-ended challenge, try the Street Sequences
investigation which asks you to look at different ways of adding house
numbers. What do you notice about the totals you get? Can you explain why?
Route to Infinity
certainly draw you in and make you determined to reach a solution! Test
your understanding by looking away from the screen and giving the first
few coordinates of the route drawn. Through how many points does the
route pass before it reaches the point (9, 4)? If you want to impress
your friends with your mathematical know-how, try the Cunning Card Trick
<http://nrich.maths.org/public/viewer.php?obj_id=5462&part=index> . The
real challenge here is explaining why it works!
You might remember that last month, the Stage 4 problems were about
finding a way to do arithmetic using geometry, where numbers are
represented by a double arrow. This month Twizzle Arithmetic
arrow arithmetic a bit of a twist and Twizzle Wind Up
continues the ideas. For the finale, can you make the twizzle twist on
its spot and so work out the hidden link in Twizzle Twists
The Stage 5 problems this month all ask you to prove results. Elevens
each focus on multiples, and you are encouraged to spot patterns, make
conjectures and then to prove these conjectures. As well as thinking
about key methods of proof, you'll be doing lots of algebraic
manipulation as you work on these problems.
We look forward to receiving your solutions.
Best wishes from The NRICH Team.
NRICH Primary Coordinator
University of Cambridge Centre for Mathematical Sciences
To post to the list send an email to
[log in to unmask]
To unsubscribe send an email to [log in to unmask]
with the message body UNSUBSCRIBE NRICH-TALK
or unsubscribe via the web at