Percentages

  • Put out the Flags
    problem

    Put out the flags

    Age
    11 to 14
    Challenge level
    filled star empty star empty star
    Tim and Beth both have a string of flags. Use the percentages to find out who has the most flags.
  • The Magic Number and the Hepta-Tree
    problem

    The magic number and the hepta-tree

    Age
    7 to 11
    Challenge level
    filled star filled star empty star
    Find the exact difference between the largest ball and the smallest ball on the Hepta Tree and then use this to work out the MAGIC NUMBER!
  • Mathland Election
    problem

    Mathland election

    Age
    11 to 14
    Challenge level
    filled star filled star empty star
    A political commentator summed up an election result. Given that there were just four candidates and that the figures quoted were exact find the number of votes polled for each candidate.
  • Round and Round
    problem

    Round and round

    Age
    14 to 16
    Challenge level
    filled star filled star empty star
    Prove that the shaded area of the semicircle is equal to the area of the inner circle.
  • Circle Packing
    problem

    Circle packing

    Age
    14 to 16
    Challenge level
    filled star filled star empty star
    Equal circles can be arranged so that each circle touches four or six others. What percentage of the plane is covered by circles in each packing pattern? ...
  • Are you a Smart Shopper?
    problem

    Are you a smart shopper?

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

    In a town there are three supermarkets which each have a special deal on some products. If you bought all your shopping in one shop, which would be the cheapest?

  • Placeholder: several colourful numbers
    problem

    Pineapple juice

    Age
    14 to 16
    Challenge level
    filled star filled star empty star
    What percentage of this orange drink is juice?
  • Trusting the Tabloids
    problem

    Trusting the tabloids

    Age
    11 to 16
    Challenge level
    filled star filled star empty star
    Can you match the cards and figure out whether the tabloid headlines can be trusted?