Working systematically

  • Eight queens
    problem

    Eight Queens

    Age
    7 to 11
    Challenge level
    2 out of 3

    Place eight queens on an chessboard (an 8 by 8 grid) so that none can capture any of the others.

  • Elf Suits
    problem

    Elf Suits

    Age
    7 to 11
    Challenge level
    2 out of 3
    If these elves wear a different outfit every day for as many days as possible, how many days can their fun last?
  • Adding Plus
    problem

    Adding Plus

    Age
    7 to 11
    Challenge level
    2 out of 3

    Can you put plus signs in so this is true? 1 2 3 4 5 6 7 8 9 = 99 How many ways can you do it?

  • All seated
    problem

    All Seated

    Age
    7 to 11
    Challenge level
    2 out of 3

    Look carefully at the numbers. What do you notice? Can you make another square using the numbers 1 to 16, that displays the same properties?

  • Chocoholics
    problem

    Chocoholics

    Age
    7 to 11
    Challenge level
    2 out of 3

    George and Jim want to buy a chocolate bar. George needs 2p more and Jim need 50p more to buy it. How much is the chocolate bar?

  • Rabbits in the pen
    problem

    Rabbits in the Pen

    Age
    7 to 11
    Challenge level
    2 out of 3

    Using the statements, can you work out how many of each type of rabbit there are in these pens?

  • Shaping Up
    problem

    Shaping Up

    Age
    7 to 11
    Challenge level
    2 out of 3

    Are all the possible combinations of two shapes included in this set of 27 cards? How do you know?

  • problem

    Winning the Lottery

    Age
    7 to 11
    Challenge level
    2 out of 3

    Find out about the lottery that is played in a far-away land. What is the chance of winning?

  • Button-Up Some More
    problem

    Button-Up Some More

    Age
    7 to 11
    Challenge level
    2 out of 3

    How many ways can you find to do up all four buttons on my coat? How about if I had five buttons? Six ...?

  • Daisy
    game

    Daisy

    Age
    7 to 11
    Challenge level
    2 out of 3

    In this game for two players, take it in turns to shade one petal, or two petals next to each other. Is it better to go first or second?