Ratio and proportion

  • Mixing Lemonade
    problem
    Favourite

    Mixing Lemonade

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

    Can you work out which drink has the stronger flavour?

  • Fractions Rectangle
    problem
    Favourite

    Fractions Rectangle

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

    The large rectangle is divided into quadrilaterals and triangles. Can you untangle what fractional part is represented by each of the ten numbered shapes?

  • Mixing Paints
    problem
    Favourite

    Mixing Paints

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

    Can you work out how to produce different shades of pink paint?

  • Temperature
    problem
    Favourite

    Temperature

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

    Is there a temperature at which Celsius and Fahrenheit readings are the same?

  • Triathlon and Fitness
    problem
    Favourite

    Triathlon and Fitness

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

    The triathlon is a physically gruelling challenge. Can you work out which athlete burnt the most calories?

  • Oh for the mathematics of yesteryear
    problem
    Favourite

    Oh for the Mathematics of Yesteryear

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

    A garrison of 600 men has just enough bread ... but, with the news that the enemy was planning an attack... How many ounces of bread a day must each man in the garrison be allowed, to hold out 45 days against the siege of the enemy?

  • A Chance to Win?
    problem
    Favourite

    A Chance to Win?

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

    Imagine you were given the chance to win some money... and imagine you had nothing to lose...

  • Ratio Sudoku 1
    problem
    Favourite

    Ratio Sudoku 1

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

    A Sudoku with clues as ratios.

  • Nutrition and Cycling
    problem
    Favourite

    Nutrition and Cycling

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

    Andy wants to cycle from Land's End to John o'Groats. Will he be able to eat enough to keep him going?