Can you match pairs of fractions, decimals and percentages, and beat your previous scores?
Can you find the pairs that represent the same amount of money?
If the base of a rectangle is increased by 10% and the area is unchanged, by what percentage is the width decreased by ?
Can you match the cards and figure out whether the tabloid headlines can be trusted?
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.
Prove that the shaded area of the semicircle is equal to the area of the inner circle.
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? ...