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There are to be 6 homes built on a new development site. They could be semi-detached, detached or terraced houses. How many different combinations of these can you find?

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This challenge is to design different step arrangements, which must go along a distance of 6 on the steps and must end up at 6 high.

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Train Carriages

Suppose there is a train with 24 carriages which are going to be put together to make up some new trains. Can you find all the ways that this can be done?

Unit Differences

Stage: 1 Challenge Level: Challenge Level:1

Begin by deciding which multiple of 10 you are going to work with. Will it be 10 or 20 or 30 or 40 or 50 or 60 or 70 or 80 or 90?

Then pick two numbers and find the difference between them.

This sheet of blank pyramids may be useful.