Do you want to stretch your brain with clever puzzles that feel like a “brain test”? You’re in the right place.
In this article you’ll find eight different categories of brain test riddles—forty total—that will make you think in new ways.
No fluff, just puzzles you can try now and share with friends or students.
Let’s dive in and challenge your mind!
Easy Brain Test Riddles
- 🕰️ What has a face and two hands but no arms or legs?
Answer: A clock - 🧷 What has one eye but cannot see?
Answer: A needle - 🪙 What has a head and a tail but no body?
Answer: A coin - 🌊 What gets wetter and wetter the more it dries?
Answer: A towel - 🎈 What goes up but never comes down?
Answer: Your age - 💡 I fill a room, but take no space. What am I?
Answer: Light - 🔑 What has keys but can’t open locks?
Answer: A piano - 🚿 What has many teeth but cannot bite?
Answer: A comb - 🍳 What gets broken before you use it?
Answer: An egg - 🎁 I’m bought to eat but never eaten. What am I?
Answer: A plate
Word & Letter Play Brain Test Riddles
- ✉ What begins and ends with E but has only one letter inside?
Answer: Envelope - 📖 Which English word has three consecutive double letters?
Answer: Bookkeeper - 🅰 What begins with T, ends with T, and has T inside?
Answer: Teapot - 🔤 Which letter of the alphabet has the most water?
Answer: C - 🗺 What has cities but no houses, forests but no trees, and rivers but no water?
Answer: A map - 🤐 What disappears the moment you say its name?
Answer: A secret - 🕰 Which word becomes shorter when you add two letters to it?
Answer: Short - 🤔 What begins with E, ends with E, but has only one letter?
Answer: Envelope (repeat in trick form) - 📚 What’s black and white and “read” all over?
Answer: A newspaper - 🧊 What’s always in front of you but you can’t see it? →
Answer: The future
Math & Number Brain Test Riddles
- ⏰ I add 5 to 9 and the result is 2. What am I?
Answer: A clock (5 + 9 = 14 → 2 o’clock) - ➕ Which number stays the same when multiplied by any other number?
Answer: Zero - 🔢 What can you put between 4 and 5 to make the result bigger than 4 but less than 5?
Answer: A decimal (4.5) - 🕰 You subtract 10 from 25. How many times can you do it?
Answer: Only once (then you’re at 15) - 🧮 I’m an odd number. Remove one letter, I become even. What number am I?
Answer: Seven - 💯 If two’s company and three’s a crowd, what are four and five?
Answer: Nine - 🔀 What three numbers give the same result when added and multiplied?
Answer: 1, 2, 3 (1+2+3 = 6, 1×2×3 = 6) - 🔢 When you subtract 10 from 100, how many times can you subtract?
Answer: Once
Science & Nature Brain Test Riddles
- 🔥 Feed me, and I live. Give me water, and I die. What am I?
Answer: Fire - 🌱 I am not alive, but I grow. I don’t have lungs, but need air. What am I?
Answer: Fire - ☔ What falls but never breaks, and what breaks but never falls?
Answer: Night & Day - 🌍 What always runs but never walks?
Answer: A river - 🕳 What is full of holes but still holds water?
Answer: A sponge - 👂 What has ears but can’t hear?
Answer: A cornfield - 🦶 What has feet but no legs?
Answer: A ruler - 🌙 What comes once in a minute, twice in a moment, but never in a thousand years?
Answer: The letter M - 🌀 What can go through glass without breaking it?
Answer: Light - 🌪 What’s in seasons, seconds, centuries, and minutes but not in decades, years, or days?
Answer: The letter “n”
Trick & Funny Brain Test Riddles
- 🥚 What can you break, even if you never pick it up or touch it?
Answer: A promise - 🍴 What’s full of holes but still holds water?
Answer: A sponge - 🐻 Why are ghosts bad at lying?
Answer: You can see right through them - 🦝 What kind of room has no doors or windows?
Answer: A mushroom - 📦 What has one eye but can’t see?
Answer: A needle - 👓 What belongs to you but others use it more than you do?
Answer: Your name - 📦 What has many keys but can’t open a single lock?
Answer:A piano - 📂 What word is always spelled wrong in the dictionary?
Answer: Wrong - ⏰ What has hands but cannot clap?
Answer: A clock - 🧩 What can you catch but not throw?
Answer: A cold
Advanced & Hard Brain Test Riddles
- 🕰 What gets bigger the more you take away?
Answer: A hole - 🌀 What begins the end, ends time and space, and begins every place?
Answer: The letter “E” - ☁ A word I know, six letters it contains, remove one letter and 12 remains. What is it?
Answer: Dozens - 🚪 Leave me and I die. Eat me and you live. What am I?
Answer: Fire (if “leave” means remove fuel) - 💡 Which weighs more: a pound of feathers or a pound of bricks?
Answer: They weigh the same - 🔁 If three hens lay three eggs in three days, how many eggs does one hen lay in one day?
Answer: One - 👑 I speak without a mouth, hear without ears, have no body, but I come alive with wind. What am I?
Answer: An echo - 🔐 A man was born in 1995, but in 2025 he will celebrate his 18th birthday. How?
Answer: He’s born in room number 1995, not year - 🧮 You see 30 cows in a field, but 28 in the picture. Why?
Answer: Two cows are hidden behind others - 🌲 I’m found in everything and nothing, I’m what ends and what begins. What am I?
Answer: The letter “G”
Conclusion
You now have forty brain test riddles spanning easy, word play, math, lateral thinking, science, funny, and advanced puzzles. Share them with friends or students.
The best way to sharpen your mind is by challenge and these riddles will do exactly that.Keep thinking, keep laughing, and enjoy the fun of brain puzzles!
I started Riddlistic.com to share riddles that are fun, tricky, and make you think. 🧠✨My goal is to entertain and challenge you with every riddle you solve! 🎉