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Positive About Negative Numbers
In this article for teachers, Liz Woodham describes resources on NRICH that can help primary-aged children get to grips with negative numbers.
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problem
3 out of 3
Platonic Planet
14 to 16
3 out of 3
Glarsynost lives on a planet whose shape is that of a perfect
regular dodecahedron. Can you describe the shortest journey she can
make to ensure that she will see every part of the planet?
problem
1 out of 3
Shades of Fermat's Last Theorem
16 to 18
1 out of 3
The familiar Pythagorean 3-4-5 triple gives one solution to (x-1)^n + x^n = (x+1)^n so what about other solutions for x an integer and n= 2, 3, 4 or 5?
problem
1 out of 3
Summats Clear
16 to 18
1 out of 3
Find the sum, f(n), of the first n terms of the sequence: 0, 1, 1, 2, 2, 3, 3........p, p, p +1, p + 1,..... Prove that f(a + b) - f(a - b) = ab.
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Number - Primary Students
These challenges will help your understanding of number and place value.
problem
2 out of 3
Favourite
Baravelle
7 to 16
2 out of 3
What can you see? What do you notice? What questions can you ask?
problem
3 out of 3
Clock Hands
7 to 11
3 out of 3
This investigation explores using different shapes as the hands of the clock. What things occur as the the hands move.
problem
1 out of 3
Farey Fibonacci
16 to 18
1 out of 3
Investigate Farey sequences of ratios of Fibonacci numbers.