Investigate how you can work out what day of the week your birthday will be on next year, and the year after...
Place the numbers 1, 2, 3,..., 9 one on each square of a 3 by 3 grid so that all the rows and columns add up to a prime number. How many different solutions can you find?
Here are three 'tricks' to amaze your friends. But the really clever trick is explaining to them why these 'tricks' are maths not magic. Like all good magicians, you should practice by trying them. Can you explain how they work?
Good way of introducing the value of algebraic notation.
Does this work with fractions, decimals and negative numbers?
Good for a whole class activity