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Days and Dates

Investigate how you can work out what day of the week your birthday will be on next year, and the year after...

Prime Magic

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?

Is it Magic or Is it Maths?

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?

Mind Reading

Age 11 to 14 Challenge Level:
Think of a number, Add one, Double it, Take away 3, Add the number you first thought of, Add 7, divide by 3, take away the number you first thought of, You should now be left with 2. How do I know?