Prove that the shaded area of the semicircle is equal to the area of the inner circle.
If a sum invested gains 10% each year how long before it has doubled its value?
Your school has been left a million pounds in the will of an ex- pupil. What model of investment and spending would you use in order to ensure the best return on the money?
A task involving the equivalence between fractions, percentages and decimals which depends on members of the group noticing the needs of others and responding.
What percentage of this orange drink is juice?
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.
There are two sets of numbers. The second is the result of the first after an increase by a constant percentage. How can you find that percentage if one set of numbers is in code?
If the base of a rectangle is increased by 10% and the area is unchanged, by what percentage is the width decreased by ?
For teachers. Yet more school maths from long ago-interest and percentages.
Can you match pairs of fractions, decimals and percentages, and beat your previous scores?
Tim and Beth both have a string of flags. Use the percentages to find out who has the most flags.
Can you find the pairs that represent the same amount of money?
Can you match the cards and figure out whether the tabloid headlines can be trusted?
When Charlie retires, he's looking forward to the quiet life, whereas Alison wants a busy and exciting retirement. Can you advise them on where they should go?
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? ...