Working systematically

  • Triangles in a Square
    problem

    Triangles in a square

    Age
    11 to 14
    Challenge level
    filled star empty star empty star

    What are the possible areas of triangles drawn in a square?

  • First Connect Three for Two
    game

    First connect three for two

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

    First Connect Three game for an adult and child. Use the dice numbers and either addition or subtraction to get three numbers in a straight line.

  • School fair necklaces
    problem

    School fair necklaces

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

    How many possible symmetrical necklaces can you find? How do you know you've found them all?

  • Number Daisy
    problem

    Number daisy

    Age
    11 to 14
    Challenge level
    filled star empty star empty star

    Can you find six numbers to go in the daisy from which you can make all the numbers from 1 to a number bigger than 25?