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See how the weight of weights varies across the globe.

What on earth are polar coordinates, and why would you want to use them?

Use vectors and matrices to explore the symmetries of crystals.

It is believed that weaker snooker players have a better chance of winning matches over eleven frames (i.e. first to win 6 frames) than they do over fifteen frames. Is this true?

Can you devise a fair scoring system when dice land edge-up or corner-up?

A quadrilateral changes shape with the edge lengths constant. Show the scalar product of the diagonals is constant. If the diagonals are perpendicular in one position are they always perpendicular?

One day, five small animals in my garden had a sports day. Who do you think won each race?

Daisy and Akram have made some number patterns. Can you find out which pattern is longer?

Sara and Will were sorting some pictures of shapes on cards. "I'll collect the circles," said Sara. "I'll take the red ones," answered Will. Can you see any cards they would both want?