One must distinguish between two types of calculators: analogue and digital working. The word "digital" means, that numbers are used for calculation. …
Author: markus
Calculate with electronic – Arithmetic machines
A modern data processing system consists of several electronic devices. With special writing machines, the task on cards or paper strips is made in the …
How to read encrypted price labels ?
Sometimes when shopping, you discover mysterious signs on the packaging. Usually the trader's secret code consists of letters, The one …
How to make a magic square?
The method shown here can be applied to magic squares of any size, as far as they are an odd number of horizontal and …
What is a magic square?
Magic squares have been more than people 2500 tied up for years. Actually, there is nothing magical about these squares, because …
What is a cryptogram?
Replacing numbers with letters is called cryptography, and a cryptogram is a math problem, In the letter for …
How to do a square code?
It's not difficult at all, to create a square code. We write down any short message and count the number of letters. …
Code Form
Special and important messages
and messages are often encrypted or "written in code.". There are many opportunities, at Ver- and …