6 min read
How to Pick (and Prove) a Fair Giveaway Winner
Run an Instagram or YouTube giveaway long enough and someone will ask how you actually picked the winner. Here's how to run the draw so nobody has reason to doubt it.
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Random Choice Guide
Getting fairer results from random tools, plus practical tips for using them in classes, meetings, and group events.
How randomness works
Shuffle algorithms, the gap between ordinary and cryptographic randomness, and the real odds behind coins and dice.
Running it with people
Splitting groups, setting speaking order, prize draws, and social giveaways, and how to finish each without arguments.
Getting more from a tool
Dice counts and distributions, why a ladder draw always maps one to one, and how weighting a wheel actually behaves.
The guides fall into three groups. Some explain how randomness itself behaves, covering the difference between shuffle algorithms and the small physical bias in a real coin, so you can judge when a result is trustworthy. Others are about running a draw with people involved, where the procedure matters more than the algorithm: splitting a class into groups, deciding who presents first, awarding prizes without anyone crying foul.
The rest go deeper on individual tools. Why the total of several dice clusters in the middle, why a ladder draw can never send two people to the same outcome, what a weighted wheel is really doing. Each article embeds the tool it describes, so you can try the thing being explained without leaving the page.
5 min read
D20 Probability for D&D and TRPGs
Why D&D and most tabletop RPGs settled on the 20-sided die for checks, and exactly how much advantage and disadvantage change your odds, with the math worked out.
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All 20 Magic 8 Ball Answers, and Where It Came From
The complete list of classic Magic 8 Ball answers, what each category means, and the surprisingly long history behind the toy.
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Can Someone Rig a Ghost Leg (Ladder) Draw?
People often joke that whoever draws the ladder must have rigged it. Here's where a paper ladder draw is actually vulnerable, and why an online one isn't.
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Is a Coin Flip Really 50/50?
A coin flip is supposed to be an even split, but a real coin is not perfectly 50/50. Here is why, and why a digital coin flip is actually closer to true fairness.
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Beating Decision Fatigue with Randomness
How to reduce the fatigue of small choices, and when it is smart to let a random tool decide.
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Lottery Numbers: Pick Your Own or Go Random?
The difference between choosing numbers by birthday or pattern and drawing them at random, seen through odds and expected value.
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How to Win at Rock Paper Scissors
Rock paper scissors looks fully random, but human habits creep in. Here is how to tilt the odds slightly and how to keep it fair.
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Dice Probability Explained
The difference between one die and many, and why the total clusters in the middle, explained with simple examples.
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How the Ladder Game Works
A plain explanation of how a ladder connects each participant to a different outcome, and why the result is fair.
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How to Decide with a Roulette Wheel
From picking a meal to deciding a task, here is how to use a roulette wheel when a choice is hard, and how weights tune the odds.
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How to Use a Name Picker
From choosing a presenter to assigning chores and running giveaways, here is where a name picker fits and the setting to use for each.
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How to Make Balanced Teams
Random team making is fast, but not always best. Here is where it fits, where it falls short, and simple ways to balance teams.
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How Random Draws Work
The difference between Math.random and cryptographic randomness, and how far you can trust a result generated in the browser.
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How to Run a Raffle or Giveaway
For club events, company giveaways, or live-stream draws, fairness and transparency matter. A step-by-step guide to running one cleanly.
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How to Decide Meeting Order
Choosing who speaks first seems trivial but shapes the discussion. Here is how random order cuts hesitation and improves meetings.
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How to Split a Class into Groups
Group work is common but forming groups every lesson is a chore. Here is why random assignment helps in the classroom and how to do it fast.
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How to Run a Fair Random Draw
Randomness is not the same as fairness. Here is what a truly fair draw needs, the shuffle mistake to avoid, and how weighting works.
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