From the Mathematics Department

Some Maths riddles! Courtesy of the Maths Prefect – Anthea Michalopoulos (Year 12)

How many can you do?




  1. What mathematical symbol can be placed between 5 and 9, to get a number greater than 5 and smaller than 9?


  1. You have a barrel of water and you need to measure out just one litre. How do you do this if you only have a three-litre container and a five-litre container?


  1. How can you add eight 8’s to get the number 1,000? (only using addition)


  1. What is the largest number you can get from using just two digits? (not 99)


  1. If a pizza that has radius ā€œzā€ and height ā€œaā€ what is its volume?