21 Questions Game: Rules for the Guessing Game Plus 21 Questions to Ask

If someone suggests 21 questions on a long drive, they probably mean the guessing game. If it's a text from someone you've just met, they mean the questions. I'll give you the rules for both, a copy ready list, and the one strategy that makes you hard to beat.

Which 21 questions game do you mean?

	The guessing game	The get to know you game
Players	2 or more, or two teams	Usually 2
What happens	One person picks a secret thing, the rest ask yes or no questions	You take turns asking each other open questions
How long	Up to 21 questions a round	21 questions, often spread over a chat
Who wins	Whoever guesses it, or the answerer if nobody does	Nobody; the point is getting to know each other
Also called	Twenty questions, animal, vegetable or mineral	21 questions, get to know you questions

Guessing game rules: animal, vegetable or mineral

The 21 version is the classic parlour game Twenty Questions with one extra question. Britannica describes it like this: one player thinks of an object and tells the others whether it's animal, vegetable or mineral, or in some games abstract. The others take turns asking questions that can be answered yes or no. If someone guesses correctly they win; if nobody does, the answerer wins. You can play one against all or in two teams.

1. Choose an answerer. They think of a thing, a person, an animal or a place, and keep it secret.
2. The answerer says which category it belongs to: animal, vegetable or mineral.
3. Players take turns asking one yes or no question each, and someone keeps count.
4. The answerer must answer truthfully. Wikipedia's write up is clear that lying isn't allowed, though some groups allow 'maybe' or 'sometimes'.
5. A player can make a guess on their turn, and a wrong guess counts as one of the questions.
6. If someone names it, they win and become the next answerer.
7. If the questions run out, the answerer has stumped everyone and goes again.

The animal, vegetable or mineral catch

This is where arguments start. The categories come from the old Linnaean idea of three kingdoms of nature, and Wikipedia points out some odd results: a wooden table counts as vegetable, because wood comes from trees, and a belt could be animal if it's leather, vegetable if it's cloth, or mineral if it has a metal buckle. Agree before you start how you'll handle things made of several materials. Some groups swap the categories for person, place or thing, which avoids the problem.

Why twenty good questions can find one thing in a million

Here's the strategy. If every question splits the remaining possibilities roughly in half, Wikipedia notes that 20 questions can tell apart 1,048,576 different objects. It's the same idea as a binary search in computer science. In fact, the article says a Polish television version was cancelled after two mathematicians on the panel started using a binary search to pin down the word's alphabetical position, which made it far too easy.

So your opening questions should be broad: 'Is it alive?', 'Is it bigger than a breadbox?', 'Would I find it indoors?'. Save the specific guesses for the end.

Good opening questions for the guessing game

• Is it alive, or was it ever alive?
• Is it bigger than a loaf of bread?
• Would you find it in most homes?
• Can you hold it in one hand?
• Is it made by people?
• Is it used for work, fun or food?
• Is it a real person, rather than a character?
• Is it something you can eat?

The get to know you version: how it works

There's no rulebook for this one, so these are the house rules I'd use. Take turns asking one question each until you've both asked 21. Whoever asks a question has to answer it too if the other person asks. Each of you gets one pass for a question you'd rather skip. Keep the first few light, and let it get deeper as you go.

Playing by text rather than face to face? See our guide to every GamePigeon game for mini games you can play inside a message thread.

21 questions to ask (copy ready)

1. What's the best thing that happened to you this week?
2. What did you want to be when you were little?
3. What's a skill you'd love to learn?
4. What's your go to comfort food?
5. Where's the best place you've ever been on holiday?
6. What's a film you could watch again and again?
7. Are you a morning person or a night owl?
8. What's the last thing that made you laugh out loud?
9. What's something most people don't know about you?
10. What's the best advice anyone's given you?
11. If you could live anywhere for a year, where would it be?
12. What's your idea of a perfect day off?
13. What's a small thing that always cheers you up?
14. What's a book or podcast you'd recommend to everyone?
15. What's the bravest thing you've done?
16. Who's someone you look up to, and why?
17. What's a habit you're trying to build?
18. What's something you've changed your mind about?
19. What's your favourite memory from school?
20. What would you do with a free weekend and no plans?
21. What's one thing on your bucket list?

Need more? My list of get to know you questions goes much further, and there are questions to ask your friends if you're playing with people you already know well.

What it's called elsewhere

• UK: Twenty Questions was a long running BBC radio panel show from 1947, where a 'mystery voice' told listeners the answer before the panel started guessing.
• Hungary: it's called Barkochba, after Simon bar Kokhba, and Wikipedia notes the number of questions isn't limited to twenty.
• The Philippines: Pinoy Henyo is played in pairs against a 2 minute time limit, and the answerer can only say yes, no or maybe.
• Anywhere: 'person, place or thing' is a common swap for animal, vegetable or mineral.

My advice

Play the guessing game with kids and on car journeys, because it needs nothing and teaches them to think in categories. Play the get to know you version with a new friend or a date, and stop if it starts to feel like an interview. The house rule I'd add to the guessing game is a 'getting warmer' hint after question 15 for younger players, so nobody gives up. For more screen free ideas, try my no screen game night pack.

Related guides live in the Free Games to Play Offline and Online: Every Guide in One Place (2026).

Frequently asked questions

How do you play the 21 questions game?

One player thinks of something and says if it's animal, vegetable or mineral. Everyone else asks yes or no questions, and whoever guesses it within 21 questions wins.

What's the difference between 20 questions and 21 questions?

The guessing game is the same; 21 questions just gives you one extra question. The name 21 questions is also used for a get to know you game where two people ask each other questions.

Who wins 21 questions if nobody guesses?

The answerer. Britannica says that if there's no correct guess, the answerer is the winner.

What's the best first question in 21 questions?

A broad one that splits the options in half, such as 'Is it alive?' or 'Is it bigger than a loaf of bread?'.

Can you lie in 21 questions?

No. The answerer has to tell the truth, though some groups allow 'maybe' when the answer depends.