## Category Archives: Maths 2nd ESO

## Decimal numbers and fractions exercises

Solutions of the exercises about decimal numbers and fractions:

## Olimpiada Matemática de Albacete

Download the problems and do at least four of them: (Deadline March, 22nd)

## Where do math symbols come from?

Math is full of symbols: lines, dots, arrows, English letters, Greek letters, superscripts, subscripts … it can look like an illegible jumble. Where did all of these symbols come from? John David Walters shares the origins of mathematical symbols, and illuminates why they’re still so important in the field today.

## “Olimpiada Matemática” Problems

Delivery date: Friday, March 25th, 2016

## Prime Numbers – Sieve of Eratosthenes

The Sieve of Eratosthenes is a simple, ancient algorithm for finding all prime numbers up to a specified integer. In this case we are using a 100’s chart.