340+ STEM Riddles ๐Ÿค”๐Ÿ”ฌ for Creative Minds | 2025

By Mariah Cannon

Are you ready to challenge your brain with some STEM-themed riddles? If you’re looking for a fun and educational way to learn about Science, Technology, Engineering, and Mathematics, youโ€™ve come to the right place! Whether youโ€™re a student, teacher, or just someone who loves a good puzzle, these STEM riddles will test your knowledge and make you think outside the box. Prepare to dive into the world of science and tech with these exciting and clever riddles that everyone can enjoy!

Easy STEM Riddles for Kids

These simple STEM riddles are perfect for kids just starting to explore the world of science and technology. Theyโ€™re fun, easy to solve, and a great introduction to STEM concepts!

  • What has keys but canโ€™t open locks? ๐Ÿ—๏ธ
    Answer: A piano.
  • I have a face but no eyes, mouth, or nose. What am I? โฐ
    Answer: A clock.
  • What gets wetter the more it dries? ๐ŸŒฌ๏ธ
    Answer: A towel.
  • What can travel around the world while staying in the corner? ๐ŸŒ
    Answer: A stamp.
  • I am full of holes but still hold water. What am I? ๐Ÿ’ง
    Answer: A sponge.
  • What can you catch but not throw? ๐Ÿคง
    Answer: A cold.
  • What grows but never eats? ๐ŸŒฑ
    Answer: A plant.
  • What do you find in the middle of nowhere? ๐Ÿ”
    Answer: The letter โ€˜hโ€™.
  • What has a heart that doesnโ€™t beat? โค๏ธ
    Answer: An artichoke.
  • The more you take, the more you leave behind. What am I? ๐Ÿ‘ฃ
    Answer: Footsteps.

Fun STEM Riddles for All Ages

These riddles will make you think, laugh, and learn! Great for anyone who loves STEM and wants a little more challenge.

  • What runs but never gets tired? ๐Ÿƒโ€โ™‚๏ธ
    Answer: Water (in a river).
  • I am made of water but can freeze into a solid. What am I? โ„๏ธ
    Answer: Ice.
  • What comes once in a minute, twice in a moment, but never in a thousand years? โณ
    Answer: The letter “M.”
  • What has a bottom at the top? ๐Ÿ”ผ
    Answer: A leg.
  • What has a head, a tail, but no body? ๐Ÿช™
    Answer: A coin.
  • What flies without wings? ๐Ÿฆ…
    Answer: Time.
  • I am a three-letter word that starts with “e” and ends with “e.” What am I? ๐Ÿฐ
    Answer: An eye.
  • What can be cracked, made, told, and played? ๐Ÿƒ
    Answer: A joke.
  • What comes down but never goes up? โฌ‡๏ธ
    Answer: Rain.
  • What has one eye but canโ€™t see? ๐Ÿ‘๏ธ
    Answer: A needle.

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Science Riddles

These science riddles are sure to make you think about the world around you and how science works. From biology to physics, these puzzles have it all!

  • What makes things float in water? ๐ŸŒŠ
    Answer: Buoyancy.
  • I can be long, I can be short, I can be grown, I can be bought, I can be painted, or I can be round. What am I? ๐ŸŽจ
    Answer: A brush.
  • I am always around you but you canโ€™t see me. What am I? ๐ŸŒฌ๏ธ
    Answer: Air.
  • What has matter but no mass? โš–๏ธ
    Answer: Light.
  • What can you break but never touch? ๐Ÿง 
    Answer: A promise.
  • What happens when you heat up water to 100ยฐC? ๐Ÿ”ฅ
    Answer: It boils.
  • I am made of atoms but can be split to release energy. What am I? โšก
    Answer: Uranium.
  • What grows, but only in the dark? ๐ŸŒ‘
    Answer: A mushroom.
  • What gas do we breathe in to stay alive? ๐ŸŒฟ
    Answer: Oxygen.
  • What changes from a solid to a gas without turning into a liquid? โ„๏ธ
    Answer: Dry ice.
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Technology Riddles

For all the tech lovers out there, these riddles will have you thinking about gadgets, computers, and everything tech-related!

  • I store your photos, videos, and files. What am I? ๐Ÿ’ป
    Answer: A hard drive.
  • What runs on electricity and has a screen but isnโ€™t a TV? ๐Ÿ“ฑ
    Answer: A smartphone.
  • What can you use to browse the web? ๐ŸŒ
    Answer: A browser.
  • I can be typed, but never read. What am I? โŒจ๏ธ
    Answer: A password.
  • I am an electric device that makes your life easier. What am I? โšก
    Answer: A calculator.
  • Whatโ€™s invisible but you canโ€™t live without it? ๐ŸŒฌ๏ธ
    Answer: Wi-Fi.
  • I am a device that stores your pictures. What am I? ๐Ÿ“ท
    Answer: A camera.
  • What type of computer can fit into your pocket? ๐Ÿ’ผ
    Answer: A smartphone.
  • What can you turn off, but never see it? ๐Ÿ“ด
    Answer: The internet.
  • What uses code to run? ๐Ÿ–ฅ๏ธ
    Answer: A computer.

Engineering Riddles

Engineering is all about solving problems and building things. These riddles will test your knowledge of engineering principles and inventions!

  • What bridge is the strongest? ๐ŸŒ‰
    Answer: A suspension bridge.
  • What is built to last but can still break? ๐Ÿ”ง
    Answer: A machine.
  • What runs on rails but isnโ€™t a train? ๐Ÿš‚
    Answer: A roller coaster.
  • I am made of concrete but I am not a building. What am I? ๐Ÿ—๏ธ
    Answer: A road.
  • What is used to build houses but is never seen? ๐Ÿ 
    Answer: A blueprint.
  • Whatโ€™s the strongest material known to man? ๐Ÿ’Ž
    Answer: Diamond.
  • What do engineers use to make structures strong? โš™๏ธ
    Answer: Steel.
  • What do engineers create to make things move? ๐Ÿ”ฉ
    Answer: Machines.
  • What holds everything together but can never be seen? ๐Ÿงณ
    Answer: Gravity.
  • What is a tool used to cut and shape materials? ๐Ÿ”จ
    Answer: A saw.

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Math Riddles

Math lovers, get ready for some tricky and fun math-themed riddles. These will make you think and maybe even do some quick calculations!

  • What is the next number in this sequence: 1, 4, 9, 16, ___? โž—
    Answer: 25 (Squares of numbers: 1ยฒ, 2ยฒ, 3ยฒ, 4ยฒ, 5ยฒ).
  • What has 4 sides, but is not a square? ๐Ÿ”ฒ
    Answer: A rectangle.
  • If you add me to myself, I become 10. What am I? โž•
    Answer: 5.
  • What number is greater than 0 but smaller than 1? ๐Ÿ”ข
    Answer: A fraction.
  • If a penny is worth 1 cent, how many pennies are in a dollar? ๐Ÿ’ต
    Answer: 100.
  • How many months have 28 days? ๐Ÿ—“๏ธ
    Answer: All of them.
  • Whatโ€™s the sum of the first 10 prime numbers? โž—
    Answer: 129.
  • How many sides does a hexagon have? ๐Ÿ”ท
    Answer: 6.
  • What is half of 12? โž—
    Answer: 6.
  • What comes after a thousand and before a million? ๐Ÿ“Š
    Answer: A hundred thousand.
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Brain Teasers for STEM Lovers

These tricky brain teasers will test your logical thinking and problem-solving skills in the STEM field!

  • What has a beginning but no end? ๐Ÿ”
    Answer: A circle.
  • I am the beginning of the end, and the end of time and space. What am I? โณ
    Answer: The letter โ€œE.โ€
  • What runs but never walks, has a bed but never sleeps? โ›…
    Answer: A river.
  • The more you take, the bigger I become. What am I? ๐Ÿ“‰
    Answer: A hole.
  • I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I? ๐ŸŒฌ๏ธ
    Answer: An echo.
  • What comes once in a year, twice in a week, but never in a day? ๐Ÿ“…
    Answer: The letter โ€œE.โ€
  • What can travel at the speed of light but has no weight? โšก
    Answer: Information.
  • What is always in front of you but canโ€™t be seen? ๐Ÿ‘€
    Answer: The future.
  • What can be cracked, made, told, and played? ๐ŸŽค
    Answer: A joke.
  • I am lighter than air but still have weight. What am I? ๐Ÿชถ
    Answer: A feather.

STEM Riddles for the Advanced Thinker

For those who love a good challenge, these advanced STEM riddles will really make you think!

  • What is the only number that has letters in alphabetical order? ๐Ÿ”ข
    Answer: Forty.
  • I am invisible, but you can feel me. What am I? ๐ŸŒฌ๏ธ
    Answer: Wind.
  • Whatโ€™s the center of gravity? โš–๏ธ
    Answer: The letter “V.”
  • If you subtract me from 100, Iโ€™ll give you zero. What am I? โž–
    Answer: 100.
  • What does a geologist use to predict earthquakes? ๐ŸŒ
    Answer: A seismograph.
  • What goes up but never comes down? โฌ†๏ธ
    Answer: Your age.
  • What number comes next: 1, 4, 9, 16, 25, ___? ๐Ÿงฎ
    Answer: 36 (Squares of numbers).
  • How many planets are in the solar system? ๐ŸŒ•
    Answer: 8.
  • What element is essential for life? โš—๏ธ
    Answer: Oxygen.
  • What is the hottest planet in our solar system? ๐Ÿ”ฅ
    Answer: Venus.
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Conclusion

STEM riddles are a fun way to explore the world of Science, Technology, Engineering, and Mathematics. Whether you’re a beginner or an advanced learner, thereโ€™s a riddle for everyone in this collection. Challenge yourself, your friends, or your family with these engaging and educational puzzles!

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