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You and I play a game involving successive throws of a fair coin. Suppose I pick HH and you pick TH. The coin is thrown repeatedly until we see either two heads in a row (I win) or a tail followed by a head (you win). What is the probability that you win?

Can you use the numbers on the dice to reach your end of the number line before your partner beats you?

An old game with lots of arithmetic!

See how the motion of the simple pendulum is not-so-simple after all.

Draw some quadrilaterals on a 9-point circle and work out the angles. Is there a theorem?

Which line graph, equations and physical processes go together?

There are nasty versions of this dice game but we'll start with the nice ones...

What is the smallest number of answers you need to reveal in order to work out the missing headers?

This is a game for two players. Can you find out how to be the first to get to 12 o'clock?