Numbers are the secret language of the universe. They measure time, count money, solve problems, and even make jokes. When mixed with creativity, riddles about numbers turn simple digits into fun puzzles. These riddles sharpen your brain, entertain kids, and challenge adults to think outside the box.
Here you’ll find 100 number riddles with answers, neatly organized into 10 categories. Each one has a hint to help you and an answer right after. Get ready to laugh, learn, and test your mind with these playful math puzzles!
Easy Number Riddles
- I’m the number of days in a week. What am I?
- Hint: Calendar math.
- Answer: 7.
- I’m the number of months in a year. What am I?
- Hint: Look at the calendar.
- Answer: 12.
- I’m half of 100. What am I?
- Hint: 50 + 50 = 100.
- Answer: 50.
- I’m the first even number. What am I?
- Hint: Start small.
- Answer: 2.
- I’m two less than a dozen. What am I?
- Hint: A dozen = 12.
- Answer: 10.
- I’m the number of fingers on two hands. What am I?
- Hint: Count them all.
- Answer: 10.
- I’m the number of hours in a day. What am I?
- Hint: Time keeps ticking.
- Answer: 24.
- I’m the number that comes after 9 but before 11. What am I?
- Hint: Between single and double digits.
- Answer: 10.
- I’m the lucky number rolled often in dice games. What am I?
- Hint: Think casinos.
- Answer: 7.
- I’m the number of wheels on a tricycle. What am I?
- Hint: “Tri” means three.
- Answer: 3.
Funny Number Riddles
- Why was 6 afraid of 7?
- Hint: Wordplay.
- Answer: Because 7 8 (ate) 9.
- What did 0 say to 8?
- Hint: Shape joke.
- Answer: “Nice belt!”
- Why did 10 feel embarrassed?
- Hint: Look at its digits.
- Answer: Because it was just a 1 and a 0.
- Why was the number 3 invited to every party?
- Hint: It’s an odd one.
- Answer: Because it was fun and odd.
- Why did 4 skip dinner?
- Hint: Roman numerals.
- Answer: Because it was already IV (four).
- Why did 9 disappear?
- Hint: Punny.
- Answer: Because 7 8 9.
- What’s a math teacher’s favorite tree?
- Hint: Sounds like geometry.
- Answer: Geometry.
- Why did the student eat his math homework?
- Hint: Teacher’s comment.
- Answer: Because it was a piece of pi.
- Why did 7 go to school?
- Hint: To get smarter.
- Answer: To learn its times tables.
- Why do numbers never get lonely?
- Hint: Because they’re always together.
- Answer: Because they count on each other.
Tricky Number Riddles
- I’m three times your age. In 10 years, I’ll be double your age. Who am I?
- Hint: Solve with algebra.
- Answer: 30 and 15.
- What three numbers give the same answer when added and multiplied?
- Hint: Small digits.
- Answer: 1, 2, and 3.
- I’m a number. Multiply me by any other number, and I remain the same.
- Hint: Zero clue.
- Answer: 0.
- I’m a two-digit number. My tens digit is double my ones digit.
- Hint: Multiplication.
- Answer: 42.
- I look the same upside down. What am I?
- Hint: Mirror digits.
- Answer: 8.
- I become greater when flipped upside down. What am I?
- Hint: Think of 6.
- Answer: 6 (becomes 9).
- Remove one letter from me and I become even. What number am I?
- Hint: Word riddle.
- Answer: Seven.
- I’m not odd. Divide me by 2, and I’m still whole. What am I?
- Hint: Even numbers.
- Answer: Any even number.
- I’m the only even prime number. What am I?
- Hint: Think small.
- Answer: 2.
- Add me to myself and you’ll still find nothing. What am I?
- Hint: Empty.
- Answer: 0.
Math Puzzle Riddles
- Double me and add 6 to get 20. What am I?
- Hint: Equation.
- Answer: 7.
- I’m between 30 and 40 and divisible by 3.
- Hint: Multiples.
- Answer: 36.
- Two numbers add to 15 and multiply to 50. What are they?
- Hint: Factors.
- Answer: 10 and 5.
- What two numbers multiply to 24 and add to 11?
- Hint: Try factors of 24.
- Answer: 8 and 3.
- 5 cats catch 5 mice in 5 minutes. How many cats catch 100 mice in 100 minutes?
- Hint: Think ratio.
- Answer: 5 cats.
- I am a square number less than 50.
- Hint: Perfect squares.
- Answer: 1, 4, 9, 16, 25, 36, 49.
- I’m a three-digit number, same forwards and backwards.
- Hint: Palindrome.
- Answer: 121.
- I’m the only number spelled with letters in alphabetical order.
- Hint: Small number.
- Answer: Forty.
- If 2 = 6, 3 = 12, 4 = 20, then 5 = ?
- Hint: Pattern puzzle.
- Answer: 30.
- I’m a number divisible by every other number. What am I?
- Hint: Infinity thought.
- Answer: 0.
Wordplay Number Riddles
- What number is spelled the same upside down?
- Hint: Look at digits.
- Answer: 8.
- I rhyme with heaven, but I’m not eleven.
- Hint: Think small.
- Answer: Seven.
- Add “one” to me, I stay the same. What am I?
- Hint: Wordplay.
- Answer: Stone (st + one).
- I’m a number and also a kind of tree.
- Hint: Homophone.
- Answer: Four (fir).
- What’s odd about even?
- Hint: Wordplay again.
- Answer: There’s an “odd” in “even.”
- What number is always sleepy?
- Hint: Word sound.
- Answer: Forty winks (40).
- What number do you call when you’re scared?
- Hint: Emergency.
- Answer: 911.
- Which number is most curious?
- Hint: Question marks.
- Answer: 2 (two/too).
- What number do you associate with love?
- Hint: Couples.
- Answer: 2.
- Which number has a point?
- Hint: Decimal.
- Answer: 1.
Hard Number Riddles
- I’m a prime number between 90 and 100. What am I?
- Hint: Test divisibility.
- Answer: 97.
- I’m the only number you can’t divide by.
- Hint: Impossible math.
- Answer: 0.
- I’m a two-digit number. My digits add to 9, and their difference is 3.
- Hint: Equation.
- Answer: 63.
- I’m less than 20 but greater than 15 and divisible by 4.
- Hint: Options.
- Answer: 16.
- Multiply me by myself and add 2. The result is 6. What am I?
- Hint: Solve x² + 2 = 6.
- Answer: 2.
- Which number is twice the sum of its digits?
- Hint: Small test.
- Answer: 18.
- I’m the smallest number that has three different prime factors.
- Hint: Multiply small primes.
- Answer: 30.
- If today is Sunday, what day will it be in 100 days?
- Hint: Divide 100 by 7.
- Answer: Tuesday.
- What’s the square root of 81?
- Hint: Multiplication fact.
- Answer: 9.
- I’m greater than 50 and less than 60, and I’m prime.
- Hint: Between 51–59.
- Answer: 53.
Kid-Friendly Number Riddles
- How many sides does a triangle have?
- Hint: “Tri” means three.
- Answer: 3.
- How many legs do 2 dogs have?
- Hint: 4 + 4.
- Answer: 8.
- How many colors are in a rainbow?
- Hint: ROYGBIV.
- Answer: 7.
- How many letters are in the alphabet?
- Hint: Basic school knowledge.
- Answer: 26.
- How many wheels are on a car?
- Hint: Don’t forget the spare.
- Answer: 4 (sometimes 5).
- How many days are in February in a leap year?
- Hint: Extra day.
- Answer: 29.
- How many seconds are in one minute?
- Hint: Tick-tock.
- Answer: 60.
- How many minutes in an hour?
- Hint: Standard time.
- Answer: 60.
- How many sides does a square have?
- Hint: Geometry.
- Answer: 4.
- How many days are in a leap year?
- Hint: Count carefully.
- Answer: 366.
Logic Number Riddles
- If you multiply me by 2 and add 10, you get 20. What am I?
- Hint: Equation.
- Answer: 5.
- Which number is always in the middle?
- Hint: Range 1–10.
- Answer: 5.
- I’m a number you get when you add all the fingers on one hand.
- Hint: Count them.
- Answer: 5.
- Which number is odd but spelled with even letters?
- Hint: English.
- Answer: Seven.
- If you divide 30 by half, what do you get?
- Hint: Trick.
- Answer: 60.
- What’s the next number: 2, 4, 8, 16, ?
- Hint: Pattern.
- Answer: 32.
- What’s the missing number: 1, 1, 2, 3, 5, 8, ?
- Hint: Fibonacci.
- Answer: 13.
- Which number is never used in Roman numerals?
- Hint: Look carefully.
- Answer: 0.
- Which number is neither prime nor composite?
- Hint: Exception.
- Answer: 1.
- Which number is known as “a baker’s dozen”?
- Hint: Extra treat.
- Answer: 13.
Short Number Riddles
- I come before two. Who am I?
- Hint: Count.
- Answer: 1.
- I’m half of 8. Who am I?
- Hint: Cut it.
- Answer: 4.
- Add me to myself and you’ll get 4. Who am I?
- Hint: Simple math.
- Answer: 2.
- I’m greater than 9 but less than 11. Who am I?
- Hint: In-between.
- Answer: 10.
- If you remove one from me, I’m nothing. Who am I?
- Hint: Subtraction.
- Answer: 1.
- I’m a pair, but if you lose one, I’m odd. Who am I?
- Hint: Even numbers.
- Answer: 2.
- What’s 100 divided by 10?
- Hint: Simple.
- Answer: 10.
- What’s the square of 5?
- Hint: 5 × 5.
- Answer: 25.
- What’s double of 7?
- Hint: Multiply by 2.
- Answer: 14.
- What’s the opposite of nothing?
- Hint: Something.
- Answer: 1 (or anything non-zero).
Brain-Teaser Number Riddles
- I’m a two-digit number. Reverse my digits, and I’m four less than twice the original. Who am I?
- Hint: Algebra needed.
- Answer: 46.
- Add me to 9, and you’ll get the same as multiplying me by 2. What am I?
- Hint: Equation.
- Answer: 9.
- What’s the only number that equals the sum of its digits multiplied together?
- Hint: Try 19.
- Answer: 19.
- I’m an odd number. Take away one letter, and I become even. What am I?
- Hint: Word trick.
- Answer: Seven.
- Which number do spiders love?
- Hint: Legs.
- Answer: 8.
- I’m a number less than 10. Add me to myself, then divide by 2, and I’m still me. What am I?
- Hint: Identity.
- Answer: Any number.
- I’m the sum of the angles in a triangle. What am I?
- Hint: Geometry.
- Answer: 180.
- I’m a round number but not a circle. What am I?
- Hint: Think digits.
- Answer: 0.
- Which number do you see on a scale?
- Hint: Weight.
- Answer: 0 to whatever.
- I’m the number of lives a cat is said to have. What am I?
- Hint: Myth.
- Answer: 9.
Final Thought
Numbers are fun, mysterious, and full of clever wordplay. These riddles show how digits can make us laugh, think, and sharpen our minds. Whether you’re a math lover or just enjoy a good puzzle, number riddles prove that learning and laughter go hand in hand.
FAQs
1. Why are number riddles useful?
They build logical thinking, math skills, and problem-solving abilities in a fun way.
2. Can kids solve number riddles?
Yes! Many are designed to be simple and entertaining for children.
3. What’s the most popular number riddle?
“Why was 6 afraid of 7? Because 7 8 9.”
4. Do number riddles help in learning math?
Absolutely — they make numbers exciting and engaging.
5. Where can I use number riddles?
In classrooms, family games, quizzes, or just casual fun.
