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Back to The Problem with Problem Solving

Three Squares

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

Find the Difference printable sheet

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

One circle in the top row, two circles in the next row, three circles in the bottom row

For example: The number 3 above the numbers 2 and 5 5 - 2 = 3

You could use this interactivity to try out your ideas:

Can you find more than one solution?

Can you find all the possible solutions? How do you know you have found them all?