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Which Twin Is Older?

A simplified account of special relativity and the twins paradox.

Snookered

In a snooker game the brown ball was on the lip of the pocket but it could not be hit directly as the black ball was in the way. How could it be potted by playing the white ball off a cushion?

Spokes

Draw three equal line segments in a unit circle to divide the circle into four parts of equal area.

Making More Tracks

Age 16 to 18
Challenge Level

There are a great many situations in which this problem will lead to experience outside the classroom.

Asking students to look out for examples of this mathematics in action may lead to some interesting observations.