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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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Follow the Numbers

What happens when you add the digits of a number then multiply the result by 2 and you keep doing this? You could try for different numbers and different rules.

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?