problem Magic Matrix Age 7 to 11 Challenge level Find out why these matrices are magic. Can you work out how they were made? Can you make your own Magic Matrix?
problem Decimal Time Age 11 to 14 Challenge level Use the clocks to investigate French decimal time in this problem. Can you see how this time system worked?
problem Repetitiously Age 14 to 16 Challenge level Can you express every recurring decimal as a fraction?
problem Tiny Nines Age 14 to 16 Challenge level What do you notice about these families of recurring decimals?
problem Matching Fractions, Decimals and Percentages Age 7 to 14 Challenge level Can you match pairs of fractions, decimals and percentages, and beat your previous scores?
problem Shopping Basket Age 11 to 16 Challenge level The items in the shopping basket add and multiply to give the same amount. What could their prices be?
problem Forgot the Numbers Age 7 to 11 Challenge level On my calculator I divided one whole number by another whole number and got the answer 3.125. If the numbers are both under 50, what are they?