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### Number and algebra

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### Graphing Number Patterns

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### How Big Are Classes 5, 6 and 7?

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Age 7 to 11

Challenge Level

Does a graph of the triangular numbers cross a graph of the six times table? If so, where? Will a graph of the square numbers cross the times table too?

Use the information about the ducks on a particular farm to find out which of the statements about them must be true.

Use the two sets of data to find out how many children there are in Classes 5, 6 and 7.