Odd and even numbers

  • 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?

  • 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?

  • problem

    Cube bricks and daisy chains

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

    Daisy and Akram have made some number patterns. Can you find out which pattern is longer?

  • problem

    Pairs of numbers

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

    If you have ten counters numbered 1 to 10, how many can you put into pairs that add to 10? Which ones do you have to leave out? Why?

  • problem

    Two numbers under the microscope

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

    This investigates one particular property of number by looking closely at an example of adding two odd numbers together.

  • What Could \It Be?
    problem

    What could it be?

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

    In this calculation, the box represents a missing digit. What could the digit be? What would the solution be in each case?

  • What number?
    problem

    What number?

    Age
    5 to 7
    Challenge level
    filled star filled star empty star
    I am less than 25. My ones digit is twice my tens digit. My digits add up to an even number.
  • Ring a Ring of Numbers
    problem

    Ring a ring of numbers

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

    Choose four of the numbers from 1 to 9 to put in the squares so that the differences between joined squares are odd.

  • Domino Pick
    problem

    Domino pick

    Age
    5 to 7
    Challenge level
    filled star filled star empty star
    Are these domino games fair? Can you explain why or why not?
  • Numbers as Shapes
    problem

    Numbers as shapes

    Age
    5 to 7
    Challenge level
    filled star filled star empty star
    Use cubes to continue making the numbers from 7 to 20. Are they sticks, rectangles or squares?