Introducing algebra
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problemCassandra, David and Lachlan are brothers and sisters. They range in age between 1 year and 14 years. Can you figure out their exact ages from the clues? -
problemThink of two numbers
Think of two whole numbers under 10, and follow the steps. I can work out both your numbers very quickly. How?
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problemBuckets of thinking
There are three buckets each of which holds a maximum of 5 litres. Use the clues to work out how much liquid there is in each bucket.
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problemPlenty of pens
Amy's mum gave 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?
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problemAugustus' age
In 1871 a mathematician called Augustus De Morgan died. De Morgan made a puzzling statement about his age. Can you discover which year De Morgan was born in? -
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problemSuper shapes
The value of the circle changes in each of the following problems. Can you discover its value in each problem?
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problemHow many eggs?
Peter, Melanie, Amil and Jack received a total of 38 chocolate eggs. Use the information to work out how many eggs each person had. -
problemHeads and feet
On a farm there were some hens and sheep. Altogether there were 8 heads and 22 feet. How many hens were there?
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problemTwo and two
How many solutions can you find to this sum? Each of the different letters stands for a different number.