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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.

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Use these head, body and leg pieces to make Robot Monsters which are different heights.

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Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?

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A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.

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This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?

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Cut four triangles from a square as shown in the picture. How many different shapes can you make by fitting the four triangles back together?

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A game in which players take it in turns to choose a number. Can you block your opponent?

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Play this game and see if you can figure out the computer's chosen number.

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Sort the houses in my street into different groups. Can you do it in any other ways?

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Ben and his mum are planting garlic. Can you find out how many cloves of garlic they might have had?

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I'm thinking of a number. My number is both a multiple of 5 and a multiple of 6. What could my number be?

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In this game you are challenged to gain more columns of lily pads than your opponent.

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Using compass points, can you describe up to ten paths on this map so that you bring as many gems back home as possible?

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How would you create the largest possible two-digit even number from the digit I've given you and one of your choice?

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Use the interactivities to fill in these Carroll diagrams. How do you know where to place the numbers?

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Have a go at this version of John Conway's game. Do you have any good strategies for winning?

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Can you hang weights in the right place to make the the number balance balanced?

Explore our selection of interactive tangrams. Can you use the tangram pieces to re-create each picture?

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A group of animals has made a seesaw in the woods. How can you make the seesaw balance?

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Here is a chance to play a version of the classic Countdown Game.

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Can you find different ways of showing the same fraction? Try this matching game and see.

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Can you find different ways of showing the same number? Try this matching game and see!

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How many trains can you make which are the same length as Matt's and Katie's, using rods that are identical?

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A train building game for two players. Can you be the one to complete the train?

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

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Can you put these shapes in order of size? Start with the smallest.

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Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?

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The computer has made a rectangle and will tell you the number of spots it uses in total. Can you find out where the rectangle is?

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Your vessel, the Starship Diophantus, has become damaged in deep space. Can you use your knowledge of times tables and some lightning reflexes to survive?

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Think of a number and follow the machine's instructions... I know what your number is! Can you explain how I know?

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Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?

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How will you work out which numbers have been used to create this multiplication square?

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In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?

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The Number Jumbler can always work out your chosen symbol. Can you work out how?