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Two Dice

Find all the numbers that can be made by adding the dots on two dice.

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Biscuit Decorations

Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?

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Writing Digits

Lee was writing all the counting numbers from 1 to 20. She stopped for a rest after writing seventeen digits. What was the last number she wrote?

One Big Triangle

Stage: 1 Challenge Level: Challenge Level:1
You could try putting one piece in to start with and then seeing whether you can place another piece next to it.
Are you sure that triangle is the only possibility?