Working systematically

  • Number Daisy
    problem
    Favourite

    Number Daisy

    Age
    11 to 14
    Challenge level

    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?

  • Triangles in a Square
    problem
    Favourite

    Triangles in a Square

    Age
    11 to 14
    Challenge level

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

  • Cryptarithms
    problem
    Favourite

    Cryptarithms

    Age
    11 to 14
    Challenge level

    Can you crack these cryptarithms?

  • Add to 200
    problem
    Favourite

    Add to 200

    Age
    11 to 14
    Challenge level

    By selecting digits for an addition grid, what targets can you make?

  • Forwards Add Backwards
    problem
    Favourite

    Forwards Add Backwards

    Age
    11 to 14
    Challenge level

    What happens when you add a three digit number to its reverse?

  • Perimeter Challenge
    problem
    Favourite

    Perimeter Challenge

    Age
    11 to 14
    Challenge level

    Can you deduce the perimeters of the shapes from the information given?

  • About Average
    problem
    Favourite

    About Average

    Age
    11 to 14
    Challenge level

    Can you find sets of numbers which satisfy each of our mean, median, mode and range conditions?

  • Half a minute
    problem
    Favourite

    Half a Minute

    Age
    11 to 14
    Challenge level

    Anna, Ben and Charlie have been estimating 30 seconds. Who is the best?

  • Making a difference
    problem
    Favourite

    Making a Difference

    Age
    11 to 14
    Challenge level

    How many different differences can you make?

  • Completing Quadrilaterals
    problem
    Favourite

    Completing Quadrilaterals

    Age
    11 to 14
    Challenge level

    We started drawing some quadrilaterals - can you complete them?

Displaying 171 - 180 of 620