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What is the greatest number of squares you can make by overlapping three squares?

Two Dice

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

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?

Find the Difference

Age 5 to 7
Challenge Level

Place the numbers $1$ to $6$ in the circles so that each number is the difference between the two numbers just below it.

6 circles
Example:   $5 - 2 = 3$

You could try it in this interactivity.

When you have tried this and got more than one answer you could try other things like having four rows of discs and use the numbers $1$ to $10$.