Explaining, convincing and proving

Freddie Manners, of Packwood Haugh School in Shropshire solved an alphanumeric without using the extra information supplied and this article explains his reasoning.

Yatir from Israel wrote this article on numbers that can be written as $ 2^n-n $ where n is a positive integer.

Yatir from Israel describes his method for summing a series of triangle numbers.

We continue the discussion given in Euclid's Algorithm I, and here we shall discover when an equation of the form ax+by=c has no solutions, and when it has infinitely many solutions.

A introduction to how patterns can be deceiving, and what is and is not a proof.

An introduction to some beautiful results in Number Theory.