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Place the 16 different combinations of cup/saucer in this 4 by 4 arrangement so that no row or column contains more than one cup or saucer of the same colour.

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Sending and Receiving Cards

Stage: 2 Challenge Level: Challenge Level:1
You could draw some sketches of the children or use dolls/teddies/any objects to represent them so you can keep track of how many cards each child sends.
How will keep track of the number of children you have tried?