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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?

Challenge Level

Take it in turns to make a triangle on the pegboard. Can you block your opponent?

Challenge Level

Two children made up a game as they walked along the garden paths. Can you find out their scores? Can you find some paths of your own?

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This problem challenges you to find out how many odd numbers there are between pairs of numbers. Can you find a pair of numbers that has four odds between them?

Challenge Level

Kimie and Sebastian were making sticks from interlocking cubes and lining them up. Can they make their lines the same length? Can they make any other lines?

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Sweets are given out to party-goers in a particular way. Investigate the total number of sweets received by people sitting in different positions.

Challenge Level

In this investigation we are going to count the number of 1s, 2s, 3s etc in numbers. Can you predict what will happen?

Challenge Level

How many different journeys could you make if you were going to visit four stations in this network? How about if there were five stations? Can you predict the number of journeys for seven stations?

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Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.

Challenge Level

In how many different ways can you break up a stick of seven interlocking cubes? Now try with a stick of eight cubes and a stick of six cubes. What do you notice?

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How many possible symmetrical necklaces can you find? How do you know you've found them all?

Challenge Level

Can you work out how to win this game of Nim? Does it matter if you go first or second?