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Archimedes and Numerical Roots

The problem is how did Archimedes calculate the lengths of the sides of the polygons which needed him to be able to calculate square roots?

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Weekly Problem 22 - 2012
What number could replace * so that */5 is between 3 and 4?

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Time to Evolve

How many generations would link an evolutionist to a very distant ancestor?

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?