ATRACTOR

Approximations of Pi

Euclidean Algorithm

Fibonacci sequence

Identification numbers with check digit algorithms

Identification numbers with check digit algorithms

Incommensurability

Is Pi normal? An open question...

Knowing Pi better

Modular Arithmetic

Multiples and divisors

On the average

Operating with fractions - Math without words

Prime numbers

Rectangular Billiard

Recycling the error

Riddles with numbers

Sieve of Eratosthenes

The number Pi

The shapes and the numbers

Actividade: Jogando com números (in Portuguese)

Adivinhas com números, Gazeta de Matemática, 11/2016 (in Portuguese)

Em média, Gazeta de Matemática, 11/2017 (in Portuguese)

Incomensurabilidade, Gazeta de Matemática, 3/2008 (in Portuguese)

Matemática Viva - Pi: o cilindro e as três esferas (in Portuguese)

Pi in base 27

Sistemas de identificação com algarismos de controlo, Ed. e Mat., 1,2/2006 (in Portuguese)

The dynamics of a trick: Considering other bases