This black box reveals random values of some important, but
unusual, mathematical functions. Can you deduce the purpose of the
This group tasks allows you to search for arithmetic progressions
in the prime numbers. How many of the challenges will you discover
An introduction to proof by contradiction, a powerful method of mathematical proof.
A weekly challenge concerning prime numbers.
How many divisors does factorial n (n!) have?
A game in which players take it in turns to choose a number. Can you block your opponent?
Make a line of green and a line of yellow rods so that the lines
differ in length by one (a white rod)
Take any prime number greater than 3 , square it and subtract one.
Working on the building blocks will help you to explain what is
special about your results.