Here are some challenges that you can work on and then see if you can convince someone that your solutions are right! Have a go!
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Even and odd
This activity is best done with a whole class or in a large group. Can you match the cards? What happens when you add pairs of the numbers together?
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I Like ...
Mr Gilderdale is playing a game with his class. What rule might he have chosen? How would you test your idea?
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Two numbers under the microscope
This investigates one particular property of number by looking closely at an example of adding two odd numbers together.
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Ring a Ring of Numbers
Choose four of the numbers from 1 to 9 to put in the squares so that the differences between joined squares are odd.
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Numbers as Shapes
Use cubes to continue making the numbers from 7 to 20. Are they sticks, rectangles or squares?
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A Bag of Marbles
Use the information to describe these marbles. What colours must be
on marbles that sparkle when rolling but are dark inside?
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How Odd
This problem challenges you to find out how many odd numbers there are between pairs of numbers. Can you find a pair of numbers that has four odds between them?
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In the Playground
What can you say about the child who will be first on the playground tomorrow morning at breaktime in your school?
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Lots of Lollies
Frances and Rishi were given a bag of lollies. They shared them out evenly and had one left over. How many lollies could there have been in the bag?
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Odd times Even
This problem looks at how one example of your choice can show something about the general structure of multiplication.