RGB Colour Code? Every colour on the screen can be represented using an RGB code (Red, Green, Blue) code. This code consists of three numbers between 0 and 255, indicating how much red, green and blue are used to recreate…
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CMYK to RGB Conversion Algorithm
CMYK and RGB are two different colour models. The CMYK model is used in the publishing/printing industry as it is based on the four basic colours used for printing colour images on white paper. The four colours of the CMYK…
Four Corners Javascript Challenge
Four corners is a children’s game, often played in primary/elementary schools. The game can be played in a classroom. One player stand in the middle of the room with a blindfold. All the other participants choose one of the four…
Jack and the Beanstalk
In the English fairy tale, Jack and the beanstalk, Jack is a young, poor boy living with his mother and a dairy cow on a farm cottage. The cow’s milk is their only source of income. When the cow stops…
Visual Cryptography
Visual cryptography is a technique that consists of hiding information (text/symbols/graphics) within two semi-transparent pictures (called layers). Overlaying both pictures exactly on top of one another, will reveal the hidden information. Using this technique, it is impossible to retrieve any…
Step Count Algorithm in LMC
Count-controlled loops are used in many programs to increment a counter for each iteration of the loop. Per default the increment for the counter is +1. FOR counter FROM 1 TO 10: OUTPUT (COUNTER) However you can specify a different…
Atbash Cipher Algorithm
The Atbash Cipher is a monoalphabetic substitution cipher that was originally used for the Hebrew alphabet. It is one of the earliest known subtitution ciphers to have been used. As opposed to a Caesar Cipher, the Atbash cipher does not…
Polar vs. Cartesian Coordinates
In this blog post we will investigate two types of coordinates used to identify the location of a point on a 2D plan: Cartesian Coordinates (x,y) Polar Coordinates (r,θ) Both sets of coordinates have their own applications and are often…
MRX20 – Mission to Mars
The MRX20 probe was sent to Mars by the Inter-Continental Space Agency (ICSA) a few years ago. It was due to return to planet Earth just a few days ago. The probe collected a large amount of samples from the…
Caesar Shift Decoder
A Caesar Shift cipher is a type of mono-alphabetic substitution cipher where each letter of the plain text is shifted a fixed number of places down the alphabet. For example, with a shift of 1, letter A would be replaced…
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