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Apply the Luhn Algorithm to decide if a credit card number is valid or not. Write a Python script to validate any credit card number using this algorithm. - Find out more on: https://www.101computing.net/is-my-credit-card-valid/

Encode and decode secret messages hidden using a visual cryptography technique. - Find out more on: https://www.101computing.net/visual-cryptography

Santa Claus has sent you a few encoded messages. Will you be able to decode these? - Find out more on: https://www.101computing.net/secret-santa-ciphers/

Use your coding and cryptography skills to decode encrypted messages using the Atbash Cipher encryption technique. - Find out more on: https://www.101computing.net/atbash-cipher-algorithm/

Become a code breaker: Use on online Frequency Analysis tool to decode a range of encrypted secret messages. - Find out more on: https://www.101computing.net/frequency-analysis/

Use a Caesar Cipher wheel and a frequency analysis to decode secret messages encoded using a Caesar Cipher. Write your own Python script to crack the Caesar Cipher encryption technique! - Find out more on: https://www.101computing.net/caesar-shift-decoder/

Join Alan Turing's team of code breakers to break the engima code and decode some secret messages from World War II. - Find out more on: https://www.101computing.net/enigma-mission-x-challenge/

Use your SQL coding skills to identify the 12 thiefs of the 12 world most prestigious gemstones. - Find out more on: https://www.101computing.net/sql-investigation-the-stolen-gemstones/

The gallery manager of the Tate Modern needs your coding skills to help him access to the world's 12 most famous paintings before the gran opening of the Expo Art exhibition. - Find out more on: https://www.101computing.net/art-expo-code-breaking-challenge/

Solve these 12 coding puzzles to locate the 12 hidden treasures of captain Blackbeard. - Find out more on: https://www.101computing.net/blackbeards-hidden-treasures/

Solve these 12 coding puzzles to locate the 12 missing pieces of the lost Roman sundial. - Find out more on: https://www.101computing.net/the-lost-roman-sundial/

Welcome to Hogwarts school of witchcraft and wizardry! For this set of challenges you will be helping the famous wizard Harry Potter to recover all of his magical possessions. - Find out more on: https://www.101computing.net/the-marauders-map-coding-challenges/

Solve these 12 coding puzzles to locate the 12 missing pieces of Pachcuti's golden shield. - Find out more on: https://www.101computing.net/the-legend-of-pachacutis-golden-shield/

Solve these 12 coding puzzles to locate the 12 missing pieces of Tutankhamun\' lost Papyrus. - Find out more on: https://www.101computing.net/tutankhamun-papyrus/

A team of archaeologists needs your help to unlock the 12 compartments and reveal the location of Ragnar Lothbrok’s treasure!​ - Find out more on: https://www.101computing.net/the-jorvik-viking-settlement/

Use your code breaking skills to hack the access codes required to unock these 3 sets of 12 digicodes. - Find out more on: https://www.101computing.net/code-breaker-challenges/

Code your way through the galaxy! Will you be able to control your spaceship to navigate through the galaxy without hitting an asteroid? - Find out more on: https://www.101computing.net/space-explorer-the-way-back-home/

Be the captain of your own pirate ship and sail the seven seas to find the 32 lost treasures of pirate island. - Find out more on: https://www.101computing.net/the-lost-treasures-of-pirate-island/

The MI6 main server has been hacked. We need your help to unlock the secret agents's phones and secure the MI6 network from future attacks. - Find out more on: https://www.101computing.net/mi6-mission-alpha/

Have you ever seen a lightning flash or heard the thunder of lightning and wondered how close you were from the ligthning strike? Find our more by completing this Python challenge. - Find out more on: https://www.101computing.net/lightning-distance-calculator/

Use your Python skills to apply Archimedes\' principle and identify the metal of a crown based on its density. - Find out more on: https://www.101computing.net/eureka-and-king-hieros-crown/

Use your Python skills to create randomised weather forecast reports for any place in the world. - Find out more on: https://www.101computing.net/weather-forecast-report/

Use your Python skills to a help a daily commuter answer their question: "In how many years will I have travelled the equivalent distance of going to the Moon and back due to my daily commute?" - Find out more on: https://www.101computing.net/to-the-moon-and-back/

Use your Python skills to generate a random name coat of arms and weapon for a medieval knight! - Find out more on: https://www.101computing.net/knight-name-generator/

Work out using a Python script how many Lego bricks would it take to build a real size planet Earth! - Find out more on: https://www.101computing.net/what-if-planet-earth-was-made-of-lego/

Code your own text based adventure game where the player will walk through the different rooms of a haunted mansion. What challenges will the player be faced in each of these rooms is for you to decide! - Find out more on: https://www.101computing.net/haunted-house/