Working systematically

  • problem

    Teddy Town - part five

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

    There are thirty six teddies in Teddy Town - six red, six blue, six yellow, six green, six purple and six turquoise. There are also thirty six houses, six of each colour. Can you put them on the map of Teddy Town according to the rules?

  • problem

    Teddy Town - part four

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

    There are twenty five teddies in Teddy Town - five red, five blue, five yellow, five green and five purple. There are also twenty five houses, five of each colour. Can you put them on the map of Teddy Town according to the rules?

  • problem

    Teddy Town - part three

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

    There are sixteen teddies in Teddy Town - four red, four blue, four yellow and four green. There are also sixteen houses, four of each colour. Can you put them on the map of Teddy Town according to the rules?

  • problem

    Teddy Town - part two

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

    There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?

  • Digit Discovery
    problem

    Digit discovery

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

    Here is an interesting property about two sets of digits. Can you work out what the digits might be?

  • Adding machine
    problem

    Adding machine

    Age
    16 to 18
    Challenge level
    filled star filled star empty star
    Can you set the logic gates so that this machine can decide how many bulbs have been switched on?
  • Seeing Rhombuses
    problem

    Seeing rhombuses

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

    Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a rhombus.

  • Seeing Parallelograms
    problem

    Seeing parallelograms

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

    Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a parallelogram.

  • Rhombus It
    problem

    Rhombus it

    Age
    11 to 16
    Challenge level
    filled star filled star empty star

    Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a rhombus.

  • Parallelogram It
    problem

    Parallelogram it

    Age
    11 to 16
    Challenge level
    filled star empty star empty star

    Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a parallelogram.