The Number Jumbler
The Number Jumbler can always work out your chosen symbol. Can you work out how?
Your number is...
Number lines in disguise
Remainders
I'm thinking of a number. My number is both a multiple of 5 and a multiple of 6. What could my number be?
Odds, evens and more evens
Alison, Bernard and Charlie have been exploring sequences of odd and even numbers, which raise some intriguing questions...
Add to 200
By selecting digits for an addition grid, what targets can you make?
Perimeter challenge
Can you deduce the perimeters of the shapes from the information given?
Colourful cube
A colourful cube is made from little red and yellow cubes. But can you work out how many of each?
Fractions rectangle
Up, down, flying around
Play this game to learn about adding and subtracting positive and negative numbers
Summing consecutive numbers
15 = 7 + 8 and 10 = 1 + 2 + 3 + 4. Can you say which numbers can be expressed as the sum of two or more consecutive integers?
Reflecting squarely
In how many ways can you fit all three pieces together to make shapes with line symmetry?
Shady symmetry
How many different symmetrical shapes can you make by shading triangles or squares?
Picturing square numbers
Square numbers can be represented as the sum of consecutive odd numbers. What is the sum of 1 + 3 + ..... + 149 + 151 + 153?
Number pyramids
Try entering different sets of numbers in the number pyramids. How does the total at the top change?
Mixing lemonade
Can you work out which drink has the stronger flavour?
Perimeter expressions
Sieve of Eratosthenes
Follow this recipe for sieving numbers and see what interesting patterns emerge.
More number pyramids
When number pyramids have a sequence on the bottom layer, some interesting patterns emerge...
Shear magic
Explore the area of families of parallelograms and triangles. Can you find rules to work out the areas?
On the edge
If you move the tiles around, can you make squares with different coloured edges?
Squares in rectangles
Searching for mean(ing)