Hard Riddles With Answers: 50 Brain Teasers for Adults and Teens

Hard riddles work because they make your brain take the obvious route first – and the obvious route is wrong. Below are 50 hard riddles with answers, sorted by type so you can pick the kind of challenge you like. Read the riddle, give yourself a real minute, then check the answer underneath.

Want an endless supply? Our free riddle generator writes new riddles on any topic at easy, medium or hard difficulty.

How to use these riddles

Game night: read one aloud and give the group 60 seconds. First correct answer gets a point.
Classroom warm-up: put one on the board at the start of the lesson and reveal the answer at the end.
Road trips: the lateral-thinking section works best out loud, because people can ask yes-or-no questions.
On your own: cover the answer, and only peek after you've written down a guess. A wrong guess teaches you more than no guess.

Wordplay riddles

These hide the answer in a double meaning. If you're stuck, look for a word that can be read two ways.

I have keys but open no locks. I have space but no room. You can enter, but you can't go inside. What am I? Answer: A keyboard.
The more of me you take, the more you leave behind. What am I? Answer: Footsteps.
I'm light as a feather, yet the strongest person can't hold me for five minutes. What am I? Answer: Breath.
What has a neck but no head, and wears a cap? Answer: A bottle.
What can you catch but never throw? Answer: A cold.
I have branches, but no fruit, trunk or leaves. What am I? Answer: A bank.
What word becomes shorter when you add two letters to it? Answer: Short (add "er" and you get "shorter").
What has many teeth but can't bite? Answer: A comb.
I'm always running but never get tired, I have a bed but never sleep. What am I? Answer: A river.
What starts with "e", ends with "e" and usually contains only one letter? Answer: An envelope.

Logic riddles

These need careful reading. Every word in the riddle matters.

A man pushes his car to a hotel and tells the owner he's bankrupt. Why? Answer: He's playing Monopoly.
Mary's father has five daughters: Nana, Nene, Nini, Nono. What is the fifth daughter's name? Answer: Mary.
What has to be broken before you can use it? Answer: An egg.
You walk into a dark cabin with one match. There's a candle, an oil lamp and a fireplace. What do you light first? Answer: The match.
Two fathers and two sons go fishing. They catch three fish and each takes one. How? Answer: There are only three people: a grandfather, his son and his grandson.
A rooster lays an egg on the peak of a barn roof. Which side does it roll down? Answer: Neither – roosters don't lay eggs.
If you're running a race and pass the person in second place, what place are you in? Answer: Second.
What comes once in a minute, twice in a moment, but never in a thousand years? Answer: The letter "m".
A doctor gives you three pills and says to take one every half hour. How long do they last? Answer: One hour. You take the first one now, the second at 30 minutes and the third at 60 minutes.
Some months have 31 days, others have 30. How many have 28? Answer: All twelve.

Number and math riddles

No calculator needed, but you will need to slow down.

A bat and a ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much is the ball? Answer: 5 cents. (If the ball cost 10 cents, the bat would cost $1.10 and the total would be $1.20.)
If it takes 5 machines 5 minutes to make 5 widgets, how long would 100 machines take to make 100 widgets? Answer: 5 minutes. Each machine makes one widget in 5 minutes.
A lily pad patch doubles in size every day. It takes 48 days to cover the whole lake. How long to cover half? Answer: 47 days.
I am an odd number. Take away one letter and I become even. What number am I? Answer: Seven (remove the "s" and you get "even").
How many times can you subtract 10 from 100? Answer: Once. After that you're subtracting from 90.
A farmer has 17 sheep. All but 9 run away. How many are left? Answer: Nine.
What number do you get when you multiply all the numbers on a phone's keypad? Answer: Zero, because one of the keys is 0.
Divide 30 by half and add 10. What do you get? Answer: 70. Dividing by one half is the same as multiplying by 2.
A clock strikes 6 in 5 seconds. How long does it take to strike 12? Answer: 11 seconds. Six strikes have five gaps of one second; twelve strikes have eleven gaps.
Three friends split a $30 hotel room, paying $10 each. The clerk realizes the room costs $25 and sends $5 back with the bellhop, who keeps $2 and returns $1 to each friend. Now each friend paid $9 (total $27), plus the bellhop's $2 makes $29. Where's the missing dollar? Answer: There isn't one. The $27 already includes the bellhop's $2 ($25 room + $2). You should subtract the $2, not add it.

Lateral thinking riddles

These are the hardest, because the answer depends on a situation you have to imagine. They work best when players can ask yes-or-no questions.

A woman shoots her husband, holds him underwater for five minutes, then hangs him. An hour later they go out to dinner. How? Answer: She's a photographer. She shot a photo, developed it in a water bath and hung it up to dry.
A man lives on the 20th floor. Every morning he takes the elevator down to the lobby. In the evening he rides only to the 12th floor and walks the rest – unless it's raining. Why? Answer: He's too short to reach the higher buttons. On rainy days he uses his umbrella to press 20.
A man walks out of a house in the rain with no umbrella and no hat. Not a single hair on his head gets wet. Why? Answer: He's bald.
Two people are born at the same moment, but they don't have the same birthday. How? Answer: They're born in different time zones, on either side of midnight.
A cowboy rides into town on Friday, stays three days and leaves on Friday. How? Answer: His horse is named Friday.
What can travel around the world while staying in one corner? Answer: A stamp.
A plane crashes exactly on the border between two countries. Where do they bury the survivors? Answer: You don't bury survivors.
A truck is stuck under a bridge, just an inch too tall. How do you get it out without damaging it? Answer: Let some air out of the tires.
Forward I'm heavy, backward I'm not. What am I? Answer: A ton ("not" backwards).
The person who makes it sells it. The person who buys it never uses it. The person who uses it never knows it. What is it? Answer: A coffin.

Object riddles

Classic "What am I?" riddles with a harder twist.

I have cities but no houses, forests but no trees, and water but no fish. What am I? Answer: A map.
I speak without a mouth and hear without ears. I have no body, but I come alive with the wind. What am I? Answer: An echo.
The more you dry, the wetter I get. What am I? Answer: A towel.
I have a face and two hands but no arms or legs. What am I? Answer: A clock.
I go up but never come down. What am I? Answer: Your age.
I'm full of holes but can still hold water. What am I? Answer: A sponge.
I can be cracked, made, told and played. What am I? Answer: A joke.
I'm tall when I'm young and short when I'm old. What am I? Answer: A candle.
What gets broken without being held? Answer: A promise.
I have one eye but cannot see. What am I? Answer: A needle.

What makes a riddle hard?

A riddle is hard when it uses one of these tricks:

A word with two meanings. "Keys", "bank" and "branches" send you in the wrong direction.
A hidden assumption. In the elevator riddle, most people assume the man is average height.
Extra numbers that don't matter. The hotel riddle adds a calculation that has nothing to do with the real money flow.
The obvious answer is a trap. In the race riddle, "first" is the answer your brain jumps to.

If you write your own riddles, start from the answer, list three unusual facts about it (a candle gets shorter, it melts, it gives light), then describe those facts in a way that sounds like something else.

Make your own hard riddles

You don't have to come up with them alone. Type a topic into the free riddle generator – for example "kitchen objects" or "space" – pick Hard, and you'll get 8 new riddles with answers in seconds. It's free and needs no sign-up, so you can generate a fresh set for every game night.

FAQ

What is the hardest riddle in this list? The hotel "missing dollar" riddle (#30) and the elevator riddle (#32) are the toughest here, because both lead you into a wrong assumption on purpose.

Are these riddles good for kids? Many of the wordplay and object riddles work for kids aged 8 and up. The math and lateral-thinking sections are better for teens and adults. For younger players, try the riddle generator's "For kids" setting.

How long should I give people to answer? About one minute for wordplay and object riddles, and two to three minutes for lateral-thinking riddles, especially if players can ask yes-or-no questions.

Can I use these riddles in my class or newsletter? Yes – they're meant to be shared. A link back to this page is appreciated.