# Resources tagged with: Creating and manipulating expressions and formulae

### There are 5 results

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Algebraic expressions, equations and formulae > Creating and manipulating expressions and formulae

##### Age 7 to 11 Challenge Level:

Can you find a way of counting the spheres in these arrangements?

##### Age 7 to 14 Challenge Level:

The Number Jumbler can always work out your chosen symbol. Can you work out how?

##### Age 7 to 11 Challenge Level:

In this 100 square, look at the green square which contains the numbers 2, 3, 12 and 13. What is the sum of the numbers that are diagonally opposite each other? What do you notice?

##### Age 7 to 11 Challenge Level:

Can you find pairs of differently sized windows that cost the same?

##### Age 7 to 14 Challenge Level:

Think of a number and follow the machine's instructions... I know what your number is! Can you explain how I know?