Odd and even numbers

  • Our Numbers
    problem

    Our numbers

    Age
    5 to 7
    Challenge level
    filled star empty star empty star

    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?

  • I Like ...
    problem

    I like ...

    Age
    5 to 7
    Challenge level
    filled star empty star empty star

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

  • Even and odd
    problem

    Even and odd

    Age
    5 to 7
    Challenge level
    filled star empty star empty star

    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?

  • Lots of Biscuits!
    problem

    Lots of biscuits!

    Age
    5 to 7
    Challenge level
    filled star empty star empty star

    Help share out the biscuits the children have made.

  • Jenny's Logic
    problem

    Jenny's logic

    Age
    11 to 14
    Challenge level
    filled star filled star empty star
    Weekly Problem 52 - 2009
    How did Jenny figure out that Tom's cards added to an even number?
  • problem

    Venn diagrams

    Age
    5 to 11
    Challenge level
    filled star empty star empty star

    How will you complete these interactive Venn diagrams?

  • Magic Vs
    problem

    Magic Vs

    Age
    7 to 11
    Challenge level
    filled star empty star empty star

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

  • Sorting Numbers
    problem

    Sorting numbers

    Age
    5 to 7
    Challenge level
    filled star empty star empty star
    Can you sort numbers into sets? Can you give each set a name?
  • Three Spinners
    problem

    Three spinners

    Age
    7 to 11
    Challenge level
    filled star empty star empty star
    These red, yellow and blue spinners were each spun 45 times in total. Can you work out which numbers are on each spinner?
  • One of Thirty-Six
    problem

    One of thirty-six

    Age
    5 to 7
    Challenge level
    filled star filled star empty star

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