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Plants

Three children are going to buy some plants for their birthdays. They will plant them within circular paths. How could they do this?

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Gran, How Old Are You?

When Charlie asked his grandmother how old she is, he didn't get a straightforward reply! Can you work out how old she is?

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More Pebbles

Have a go at this 3D extension to the Pebbles problem.

The Car That Passes

Stage: 2 Challenge Level: Challenge Level:1
What things are you going to do to find out information?
How will you decide what statements to make about the car?
How will you test whether the statements were true or not?