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### Number and algebra

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# What's Algebra All About?

### Ip Dip

### Super Shapes

### Plenty of Pens

### Shape Times Shape

### Sticky Triangles

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You might have heard your teacher or another adult talk about 'algebra'. If you have tackled problems where there were missing numbers, then chances are you'll have been doing some algebraic thinking. If you have tried challenges which involved noticing a pattern, continuing it and finding out a general rule, then you'll have been doing some algebraic thinking. The activities in this feature will
give you chances to use this kind of thinking and get better at it!

Age 5 to 11

Challenge Level

"Ip dip sky blue! Who's 'it'? It's you!" Where would you position yourself so that you are 'it' if there are two players? Three players ...?

Age 7 to 11

ShortChallenge Level

The value of the circle changes in each of the following problems. Can you discover its value in each problem?

Age 7 to 11

Challenge Level

Amy's mum had given her £2.50 to spend. She bought four times as many pens as pencils and was given 40p change. How many of each did she buy?

Age 7 to 11

Challenge Level

These eleven shapes each stand for a different number. Can you use the number sentences to work out what they are?

Age 7 to 11

Challenge Level

Can you continue this pattern of triangles and begin to predict how many sticks are used for each new "layer"?