Exploring and noticing

problem

Number squares

Age

5 to 11

Challenge level

Start with four numbers at the corners of a square and put the total of two corners in the middle of that side. Keep going... Can you estimate what the size of the last four numbers will be?
problem

Stairs

Age

5 to 11

Challenge level

This challenge is to design different step arrangements, which must go along a distance of 6 on the steps and must end up at 6 high.
problem
Favourite

I'm eight

Age

5 to 11

Challenge level

Find a great variety of ways of asking questions which make 8.
problem

Lawn border

Age

5 to 11

Challenge level

If I use 12 green tiles to represent my lawn, how many different ways could I arrange them? How many border tiles would I need each time?
problem

Street sequences

Age

5 to 11

Challenge level

Investigate what happens when you add house numbers along a street in different ways.
problem
Favourite

Growing garlic

Age

5 to 11

Challenge level

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

Venn diagrams

Age

5 to 11

Challenge level

How will you complete these interactive Venn diagrams?
problem
Favourite

Strike it out

Age

5 to 11

Challenge level

Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.
problem
Favourite

Jig shapes

Age

5 to 11

Challenge level

Can you each work out what shape you have part of on your card? What will the rest of it look like?
problem

It's a fence!

Age

5 to 11

Challenge level

In this challenge, you will work in a group to investigate circular fences enclosing trees that are planted in square or triangular arrangements.