Articles: Random Numbers, Probability and Fair Draws
These guides explain how random numbers work, how to use chance fairly, and how to get more out of the tools on Randomly. They are written in plain English with real examples, whether you are a teacher, a game host, a student or just curious.
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- True Random vs Pseudo-Random Numbers: What's the Difference?
Learn how true random and pseudo-random numbers differ, why computers usually fake randomness, and which kind you need for games, giveaways and security. - How Random Number Generators Work in Your Browser
A plain-English look at how an online random number generator picks a fair number, including the Web Crypto API and why rejection sampling avoids bias. - How to Pick a Fair Winner for a Giveaway or Contest
A practical guide to choosing a giveaway winner fairly: number your entries, fix the rules first, use a random number generator, and keep the process transparent. - 10 Ways Teachers Use a Random Number Generator in the Classroom
Ten practical classroom uses for a random number generator, from calling on students fairly to math games, group work, quizzes and warm-up activities. - Dice Probability Explained: Odds for One, Two and Three Dice
A clear guide to dice probability: the chance of each result on one die, the odds of every total on two dice, and why some sums are more common than others. - Coin Flip Odds: Fairness, Streaks and the Gambler's Fallacy
How fair is a coin flip? Explore the real odds of heads and tails, why streaks happen, and why the gambler's fallacy fools so many people. - Games and Activities You Can Play with a Random Number Generator
Fun games for parties, classrooms and families that only need a random number generator: guessing games, bingo-style draws, scavenger hunts, challenges and more. - The Birthday Paradox and Other Surprising Facts About Chance
Why do just 23 people give a 50 percent chance of a shared birthday? Explore the birthday paradox and other counter-intuitive results from probability. - Random Sampling for Surveys and Experiments: A Beginner's Guide
What random sampling is, why it matters, and how to draw a simple random sample from a numbered list using a random number generator. - Common Myths About Randomness (and What Is Actually True)
Seven popular myths about randomness, from lucky numbers to numbers being due, and the simple facts that explain why they are wrong. - A Short History of Random Numbers: From Knucklebones to Computers
From ancient dice to the first printed tables of random digits and modern secure generators, a short tour of how people have created randomness.