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Teachers' experiences of using NRICH
This collection of articles, written by teachers, focus on their experiences of embedding NRICH materials into their everyday practice.
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problem
Change Around
5 to 7
Move just three of the circles so that the triangle faces in the
opposite direction.
problem
Favourite
Simplifying Doughnut
14 to 16
Can you match up these equivalent algebraic expressions?
problem
Nine in a Line
11 to 14
The sum of 9 consecutive positive whole numbers is 2007. What is the largest of these numbers?
problem
Favourite
An Easy Way to Multiply by 10?
7 to 11
Do you agree with Badger's statements? Is Badger's reasoning 'watertight'? Why or why not?
problem
Favourite
Butterfly Flowers
5 to 7
Can you find two butterflies to go on each flower so that the numbers on each pair of butterflies adds to the number on their flower?
problem
Jigsaw Pieces
7 to 11
How will you go about finding all the jigsaw pieces that have one peg and one hole?
problem
Zin Obelisk
11 to 14
In the ancient city of Atlantis a solid rectangular object called a Zin was built in honour of the goddess Tina. Your task is to determine on which day of the week the obelisk was completed.
problem
Sheep in Wolf's Clothing
16 to 18
Can you work out what simple structures have been dressed up in these advanced mathematical representations?