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Can you guess the colours of the 10 marbles in the bag? Can you develop an effective strategy for reaching 1000 points in the least number of rounds?

Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?

Some of the numbers have fallen off Becky's number line. Can you figure out what they were?

You have two sets of the digits 0-9. Can you arrange these in the five boxes to make four-digit numbers as close to the target numbers as possible?

This box does something to the numbers that go into it. If you know the numbers that come out, what might be going on inside the box?

Imagine you had to plan the tour for the Olympic Torch. Is there an efficient way of choosing the shortest possible route?

This activity challenges you to decide on the 'best' number to use in each statement. You may need to do some estimating, some calculating and some research.

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a parallelogram.

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.

Investigate the different shaped bracelets you could make from 18 different spherical beads. How do they compare if you use 24 beads?