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Power Countdown

In this twist on the well-known Countdown numbers game, use your knowledge of Powers and Roots to make a target.

More or Less?

Stage: 4 Challenge Level: Challenge Level:1

In each question there will be some way of relating the quantities referred to. You will need to think what equations from science to use.

Once you have the equations, what quantities don't you know? Could you substitute sensible values for one of these?

Don't forget to use physical intuition. For example, an apple floats in water. What does that tell you about its density?