Exploring and noticing

problem
Favourite

Hundred Square

Age

5 to 11

Challenge level

2 out of 3

A hundred square has been printed on both sides of a piece of paper. What is on the back of 100? 58? 23? 19?
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Favourite

Growing Garlic

Age

5 to 11

Challenge level

2 out of 3

Ben and his mum are planting garlic. Can you find out how many cloves of garlic they might have had?
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Favourite

Three Squares

Age

5 to 11

Challenge level

3 out of 3

What is the greatest number of squares you can make by overlapping three squares?
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Favourite

4 Dom

Age

5 to 11

Challenge level

3 out of 3

Use these four dominoes to make a square that has the same number of dots on each side.
problem
Favourite

Tumbling Down

Age

7 to 11

Challenge level

1 out of 3

Watch this animation. What do you see? Can you explain why this happens?
game
Favourite

Dicey Operations in Line

Age

7 to 11

Challenge level

1 out of 3

In these addition, subtraction, multiplication and division games, you'll need to think strategically to get closest to the target.
problem
Favourite

Cubes

Age

7 to 11

Challenge level

1 out of 3

How many faces can you see when you arrange these three cubes in different ways?
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Favourite

Which Scripts?

Age

7 to 11

Challenge level

1 out of 3

There are six numbers written in five different scripts. Can you sort out which is which?
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Favourite

Highest and Lowest

Age

7 to 11

Challenge level

1 out of 3

Put operations signs between the numbers 3, 4, 5 and 6 to make the highest possible number and lowest possible number.
problem
Favourite

Zias and Zepts

Age

7 to 11

Challenge level

1 out of 3

On the planet Vuv there are two sorts of creatures. The Zias have 3 legs and the Zepts have 7 legs. The great planetary explorer Nico counted 52 legs. How many Zias and how many Zepts were there?