This black box reveals random values of some important, but
unusual, mathematical functions. Can you deduce the purpose of the
An introduction to proof by contradiction, a powerful method of mathematical proof.
How many divisors does factorial n (n!) have?
A weekly challenge concerning prime numbers.
This group tasks allows you to search for arithmetic progressions
in the prime numbers. How many of the challenges will you discover
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.
A game in which players take it in turns to choose a number. Can you block your opponent?