Addition and subtraction

  • Street Sequences
    problem

    Street Sequences

    Age
    5 to 11
    Challenge level
    1 out of 3

    Investigate what happens when you add house numbers along a street in different ways.

  • Mobile Numbers
    problem

    Mobile Numbers

    Age
    5 to 11
    Challenge level
    1 out of 3

    In this investigation, you are challenged to make mobile phone numbers which are easy to remember. What happens if you make a sequence adding 2 each time?

  • Today's date - 01/06/2009
    problem

    Today's Date - 01/06/2009

    Age
    5 to 11
    Challenge level
    1 out of 3

    What do you notice about the date 03.06.09? Or 08.01.09? This challenge invites you to investigate some interesting dates yourself.

  • It was 2010!
    problem

    It Was 2010!

    Age
    5 to 11
    Challenge level
    1 out of 3

    If the answer's 2010, what could the question be?

  • Sorting the Numbers
    problem

    Sorting the Numbers

    Age
    5 to 11
    Challenge level
    1 out of 3

    Complete these two jigsaws then put one on top of the other. What happens when you add the 'touching' numbers? What happens when you change the position of the jigsaws?

  • Sitting round the party tables
    problem

    Sitting Round the Party Tables

    Age
    5 to 11
    Challenge level
    1 out of 3

    Sweets are given out to party-goers in a particular way. Investigate the total number of sweets received by people sitting in different positions.

  • Half Time
    problem

    Half Time

    Age
    5 to 11
    Challenge level
    1 out of 3

    What could the half time scores have been in these Olympic hockey matches?

  • How do you see it?
    problem

    How Do You See It?

    Age
    5 to 11
    Challenge level
    1 out of 3

    Here are some short problems for you to try. Talk to your friends about how you work them out.

  • Strike it out
    game

    Strike It Out for Two

    Age
    5 to 11
    Challenge level
    1 out of 3

    Strike it Out game for an adult and child. Can you stop your partner from being able to go?

  • Dotty Six for Two
    game

    Dotty Six for Two

    Age
    5 to 11
    Challenge level
    1 out of 3

    Dotty Six game for an adult and child. Will you be the first to have three sixes in a straight line?