Classic Logic Riddles
You see a boat filled with people, yet there is not a single person on board. How can that be?
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Everyone on the boat is married.
A farmer has 17 sheep and all but 9 run away. How many are left?
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Nine.
Three doctors said that Bill was their brother, yet Bill says he has no brothers. How is this possible?
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The doctors are Bill's sisters.
What has cities, but no houses; forests, but no trees; and rivers, but no water?
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A map.
The more you take, the more you leave behind. What are they?
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Footsteps.
Forward I am heavy, but backward I am not. What am I?
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The word ton.
A man shaves several times a day, but he still has a beard. Who is he?
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A barber.
Two fathers and two sons eat exactly three eggs, each person has one egg. How?
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They are a grandfather, father, and son.
I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I?
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An echo.
What can travel around the world while staying in the same corner?
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A stamp.
Teen Debate Challenges
It belongs to you, but other people use it more than you do. What is it?
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Your name.
Johnny’s mother had three children. The first was named April and the second was named May. What was the third child’s name?
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Johnny.
What has to be broken before you can use it?
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An egg.
A man celebrates his 20th birthday on the day he turns 80. How is this possible?
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He was born on February 29.
I have keys but no locks. I have space but no room. You can enter, but you cannot go outside. What am I?
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A keyboard.
A phone and case cost $110 total. The phone costs $100 more than the case. How much is the case?
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Five dollars.
In a race, you pass the person in second place. What place are you in now?
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Second place.
If yesterday was tomorrow, today would be Friday. What day is today?
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Wednesday.
You have two coins totaling 30 cents, and one is not a nickel. What are they?
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A quarter and a nickel.
What question can you never answer yes to truthfully?
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Are you asleep?
Strategy and Escape Room Extras
A room has three switches and one bulb in another room. You may enter the bulb room once. How can you identify the switch?
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Use heat from one switched-on bulb test.
Four teens cross a bridge at night with one flashlight. Times are 1, 2, 7, and 10 minutes. What is the fastest total?
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Seventeen minutes.
Three boxes are mislabeled apples, oranges, and mixed. Which box do you sample first?
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The box labeled mixed.
A code says A=1 and Z=26. What does 20-5-5-14 spell?
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Teen.
A locker code has three digits. They add to 15, the first is 3, and the last is twice the middle. What is it?
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348.
Which card must you flip to test the rule: if a card has a vowel, it has an even number on the back? Cards show A, K, 4, and 7.
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Flip A and 7.
A train leaves at noon going 40 mph. Another leaves at 1 PM going 60 mph on the same track. When does it catch up?
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3 PM.
What word stays pronounced the same when four of its five letters are removed?
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Queue.
A detective sees a door locked from inside, a puddle, and broken glass, but nobody is in the room. Who is missing?
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A fish whose bowl broke.
I am the reason a team argues, tests, revises, and finally agrees. What am I?
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Logical proof.
FAQ
Are answers included?
Yes. Every riddle includes the answer.
Are these good for high school?
Yes. They work for advisory, debate, game nights, and escape rooms.
Want harder teen riddles?
Try hard riddles for teens.