Odd and even numbers

These spinners will give you the tens and unit digits of a number. Can you choose sets of numbers to collect so that you spin six numbers belonging to your sets in as few spins as possible?

Mr Gilderdale is playing a game with his class. What rule might he have chosen? How would you test your idea?

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?

Help share out the biscuits the children have made.

Weekly Problem 52 - 2009
How did Jenny figure out that Tom's cards added to an even number?

How will you complete these interactive Venn diagrams?

Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?

Can you sort numbers into sets? Can you give each set a name?

These red, yellow and blue spinners were each spun 45 times in total. Can you work out which numbers are on each spinner?

Can you find the chosen number from the grid using the clues?