problem
Favourite
Digit Addition
Age
5 to 11
Challenge level
Try out this number trick. What happens with different starting numbers? What do you notice?
problem
Favourite
Number Detective
Age
5 to 11
Challenge level
Follow the clues to find the mystery number.
problem
Favourite
Shaping It
Age
5 to 11
Challenge level
These pictures were made by starting with a square, finding the half-way point on each side and joining those points up. You could investigate your own starting shape.
problem
Favourite
If the World Were a Village
Age
5 to 11
Challenge level
This activity is based on data in the book 'If the World Were a Village'. How will you represent your chosen data for maximum effect?
problem
Favourite
Five Steps to 50
Age
5 to 7
Challenge level
Use five steps to count forwards or backwards in 1s or 10s to get to 50. What strategies did you use?
problem
Next-door Numbers
Age
5 to 7
Challenge level
Florence, Ethan and Alma have each added together two 'next-door' numbers. What is the same about their answers?
problem
Favourite
Eightness of Eight
Age
5 to 7
Challenge level
What do you see as you watch this video? Can you create a similar video for the number 12?
problem
Favourite
Colouring Triangles
Age
5 to 7
Challenge level
Explore ways of colouring this set of triangles. Can you make symmetrical patterns?
problem
Favourite
Chain of Changes
Age
5 to 7
Challenge level
Arrange the shapes in a line so that you change either colour or shape in the next piece along. Can you find several ways to start with a blue triangle and end with a red circle?
problem
Favourite
Ring a Ring of Numbers
Age
5 to 7
Challenge level
Choose four of the numbers from 1 to 9 to put in the squares so that the differences between joined squares are odd.
problem
Favourite
Little Man
Age
5 to 7
Challenge level
The Man is much smaller than us. Can you use the picture of him next to a mug to estimate his height and how much tea he drinks?
problem
Favourite
Light the Lights
Age
5 to 7
Challenge level
Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?
problem
Favourite
More Numbers in the Ring
Age
5 to 7
Challenge level
If there are 3 squares in the ring, can you place three different numbers in them so that their differences are odd? Try with different numbers of squares around the ring. What do you notice?
problem
Triangle transformation
Age
7 to 14
Challenge level
Start with a triangle. Can you cut it up to make a rectangle?
problem
Favourite
Fruity Totals
Age
7 to 16
Challenge level
In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?
problem
Favourite
The Number Jumbler
Age
7 to 14
Challenge level
The Number Jumbler can always work out your chosen symbol. Can you work out how?
problem
Favourite
Consecutive Numbers
Age
7 to 14
Challenge level
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
problem
Favourite
Your number is...
Age
7 to 14
Challenge level
Think of a number and follow the machine's instructions... I know what your number is! Can you explain how I know?
problem
Favourite
Number Differences
Age
7 to 11
Challenge level
Place the numbers from 1 to 9 in the squares below so that the difference between joined squares is odd. How many different ways can you do this?
problem
Favourite
Brush Loads
Age
7 to 11
Challenge level
How can you arrange the 5 cubes so that you need the smallest number of Brush Loads of paint to cover them? Try with other numbers of cubes as well.
problem
Favourite
Nice or Nasty
Age
7 to 14
Challenge level
There are nasty versions of this dice game but we'll start with the nice ones...
problem
Favourite
Subtraction Surprise
Age
7 to 14
Challenge level
Try out some calculations. Are you surprised by the results?
problem
Favourite
Statement Snap
Age
7 to 14
Challenge level
You'll need to know your number properties to win a game of Statement Snap...
problem
Favourite
Tumbling Down
Age
7 to 11
Challenge level
Watch this animation. What do you see? Can you explain why this happens?
problem
Favourite
Two Clocks
Age
7 to 11
Challenge level
These clocks have only one hand, but can you work out what time they are showing from the information?
problem
Favourite
Three neighbours
Age
7 to 14
Challenge level
Take three consecutive numbers and add them together. What do you notice?
problem
Favourite
Curious number
Age
7 to 11
Challenge level
Can you order the digits from 1-3 to make a number which is divisible by 3 so when the last digit is removed it becomes a 2-figure number divisible by 2, and so on?