You may also like

Domino Sorting

Try grouping the dominoes in the ways described. Are there any left over each time? Can you explain why?

Sort the Street

Sort the houses in my street into different groups. Can you do it in any other ways?

Shapes in the Alphabet

In this problem, we're going to find sets of letter shapes that go together.

Sorting Numbers

Age 5 to 7 Challenge Level:

Try choosing two numbers which "go together" to start with. What is the same about them?
What other numbers would go with the first two?