105 Math Riddles with Answer to Challenge your Mind

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Written By Thomas William

Math riddles are a fun way to play with numbers and test your brain. These tricky puzzles make you think in smart ways. You can find riddles of mathematics in school books, games or even in fun quizzes.

Some are easy, but others are hard and make your head spin. These riddles about mathematics help you learn while having fun. Kids love solving riddles for mathematics because they feel like little math detectives.

You’ll find math riddles with answers at the end, so you can check your thinking. Some number riddles are short, while others are longer. All are fun and exciting.

These are perfect riddles related to maths for class or at home. Want more fun? Try fun math riddles, math brain teasers or a silly math riddle with friends.

If you’re ready for a challenge, try riddles for maths with answers, riddle math or even hard math riddles and challenging math riddles with answers!

Interesting Maths Riddles With Answers

interesting-maths-riddles-with-answers
  1. What 3-digit number reads the same upside down and backward?
    Answer: 181
  2. I am a number. Multiply me by 4, add 12 and you get 36. What am I?
    Answer: 6
  3. The day before two days after the day before tomorrow is Saturday. What day is it today?
    Answer: Friday
  4. I am a two-digit number. My tens digit is five more than my ones digit. What number am I?
    Answer: 61
  5. What comes once in a minute, twice in a moment, but never in a thousand years?
    Answer: The letter M
  6. If you multiply this number by any other number, the answer will always be the same. What number is it?
    Answer: 0
  7. I’m a number between 1 and 100. Divide me by 3 and you get a remainder of 1. Divide me by 5 and you get 4. What am I?
    Answer: 19
  8. What three numbers give the same answer when added or multiplied?
    Answer: 1, 2 and 3
  9. If there are 4 apples and you take away 3, how many do you have?
    Answer: 3 (you took them)
  10. A boy has as many sisters as brothers, but each sister has only half as many sisters as brothers. How many boys and girls are there?
    Answer: 4 boys and 3 girls
  11. A clock strikes 13. What time is it?
    Answer: Time to get a new clock!
  12. I am a prime number. Add one letter and I become even. What am I?
    Answer: Seven (add “s” and it becomes “sevens”—sounds like “evens”)
  13. What two numbers multiply to 16 and add up to 10?
    Answer: 2 and 8
  14. What starts with “e” and contains only one letter?
    Answer: Envelope
  15. I am a number less than 100. I’m divisible by 3, 5 and 2. What number could I be?
    Answer: 30

ALSO READ: Halloween Riddles with Answers

Easy Math Riddles With Answers

  1. What’s half of 12 plus 6?
    Answer: 12
  2. If you add two hours to 11 AM, what time is it?
    Answer: 1 PM
  3. What’s the next number in the pattern? 2, 4, 6, 8…?
    Answer: 10
  4. If you buy 2 candy bars for $1 each, how much change do you get from $5?
    Answer: $3
  5. What is 10 divided by 2 plus 3?
    Answer: 8
  6. What shape has 3 sides?
    Answer: Triangle
  7. I’m less than 10 and more than 5. I’m also even. What number am I?
    Answer: 6 or 8
  8. If you have 5 pencils and give away 3, how many are left?
    Answer: 2
  9. What’s 7 plus 5 minus 3?
    Answer: 9
  10. What is the smallest even number?
    Answer: 0
  11. If I double 6, what do I get?
    Answer: 12
  12. I’m thinking of a number that’s between 20 and 30 and ends in 5. What is it?
    Answer: 25
  13. What’s the difference between 15 and 7?
    Answer: 8
  14. Which is heavier: a pound of feathers or a pound of bricks?
    Answer: Neither—they both weigh the same
  15. What time is it when the clock strikes 12 twice?
    Answer: Noon or midnight

Hardest Maths Puzzles With Answers

hardest-maths-puzzles-with-answers
  1. I’m a number. Multiply me by myself and then subtract me and you get 56. What am I?
    Answer: 8
  2. A farmer has 17 sheep and all but 9 run away. How many are left?
    Answer: 9
  3. A bat and a ball cost $1.10. The bat costs $1 more than the ball. How much is the ball?
    Answer: 5 cents
  4. I am a number. Multiply me by 2, subtract 4, divide by 2 and you get 6. What am I?
    Answer: 8
  5. Using only addition, add eight 8s to get the number 1,000.
    Answer: 888 + 88 + 8 + 8 + 8 = 1,000
  6. A rope is 100 feet long. It’s cut in half every hour. How many cuts to get 25 pieces?
    Answer: 24
  7. I’m a number that’s both the sum and product of three positive integers. What numbers are they?
    Answer: 1, 2 and 3 (1+2+3 = 6; 1×2×3 = 6)
  8. If 2 hens lay 2 eggs in 2 days, how many hens to lay 100 eggs in 100 days?
    Answer: 2 hens
  9. I’m a five-digit number. All my digits are odd and no digit repeats. What’s the smallest I can be?
    Answer: 13579
  10. Solve: (100 + 4) ÷ (5 + 1) = ?
    Answer: 104 ÷ 6 = 17.33
  11. If two’s company and three’s a crowd, what are four and five?
    Answer: Nine
  12. I’m a number. Subtract me from myself and you get me. What am I?
    Answer: 0
  13. If a triangle has angles 90° and 45°, what’s the third?
    Answer: 45°
  14. A man is twice as old as his son. In 10 years, he’ll be only 1.5 times older. How old is the son now?
    Answer: 20
  15. Find a number whose double is 14 more than its half.
    Answer: 8

Hard Mathematics Puzzle

  1. I am a number. Multiply me by 2, then add 8 and divide by 2 again. You get 10. What am I?
      Answer: 6
  2. If 4 pencils cost 32 cents, how much do 7 pencils cost?
      Answer: 56 cents
  3. A farmer has 17 sheep. All but 9 run away. How many are left?
      Answer: 9
  4. What two numbers multiply to 36 and add to 13?
      Answer: 9 and 4
  5. Which 3-digit number has digits that add up to 9 and is divisible by both 3 and 9?
      Answer: 126
  6. I’m a number. Subtract me from 100 and you’ll get my half. What number am I?
      Answer: 66.66…
  7. A pizza is cut into 8 slices. If you eat half of them, then 2 more, how many are left?
      Answer: 2
  8. Add me to myself and multiply by 4. I become 72. What number am I?
      Answer: 6
  9. A man is 4 times as old as his son. In 20 years, he’ll be only twice as old. How old is the son now?
      Answer: 10
  10. Fill in the blank: 3 + 33 + 333 = ?
      Answer: 369
  11. I have two digits. The product of my digits is 8. The sum is 9. What number am I?
      Answer: 81
  12. There are 100 doors. Each pass, you toggle every nth door. How many doors are left open?
      Answer: 10
  13. Which number comes next: 2, 3, 5, 8, 12, 17, ___?
      Answer: 23
  14. A clock shows 3:15. What angle is between the hands?
      Answer: 7.5 degrees
  15. A bag contains 5 red, 4 blue and 3 green marbles. What’s the minimum you must pull to guarantee 2 of the same color?
      Answer: 4

Riddles with Numbers

riddles-with-numbers
  1. I’m a two-digit number. My digits add up to 9. I’m greater than 50. What number can I be?
      Answer: 63
  2. Turn me upside down and I’m still the same. What number am I?
      Answer: 69
  3. I’m a number between 30 and 40, divisible by 7. Who am I?
      Answer: 35
  4. I’m the smallest number that’s the sum of two cubes in two ways.
      Answer: 1729
  5. I’m even. Add 1 and I’m odd. Add another and I’m even again. What am I?
      Answer: Any even number
  6. What three numbers give the same result when added or multiplied?
      Answer: 1, 2, 3
  7. If 5 cats catch 5 mice in 5 minutes, how many cats to catch 100 mice in 100 minutes?
      Answer: 5
  8. I’m a number. Divide me by 2 and then by 2 again, you get 4. What number am I?
      Answer: 16
  9. I’m less than 100. My digits reverse is 3 times me. What number am I?
      Answer: 21
  10. I’m the only even prime number.
      Answer: 2
  11. My digits add up to 6 and I’m a multiple of 3 and 2. Smallest such number?
      Answer: 6
  12. If 3x + 5 = 20, what’s x?
      Answer: 5
  13. I am a number that is both a square and a cube. Smallest one?
      Answer: 64
  14. I am a 3-digit palindrome that ends in 7.
      Answer: 727
  15. What’s the next number? 1, 11, 21, 1211, 111221, ___
      Answer: 312211

Arithmetic Puzzles with Answers

  1. What’s 25% of 200?
      Answer: 50
  2. If 8 × X = 64, what’s X?
      Answer: 8
  3. Double me and add 6. You get 18. What number am I?
      Answer: 6
  4. A man bought 3 pens at $2 each and 2 books at $5 each. How much did he spend?
      Answer: $16
  5. I’m thinking of a number. I subtract 4 and divide by 2. I get 6. What’s the number?
      Answer: 16
  6. What is ⅓ of 90?
      Answer: 30
  7. Jane has 3 times as many apples as Mike. Together, they have 16. How many does Jane have?
      Answer: 12
  8. If a toy costs $15 and you buy 4, how much do you spend?
      Answer: $60
  9. Divide 81 by 9, then multiply by 3.
      Answer: 27
  10. What is the sum of first 5 even numbers?
      Answer: 30
  11. A chair costs $30, a table $60 and a lamp $10. What’s the total?
      Answer: $100
  12. What is the missing number: 5, 10, __, 20, 25?
      Answer: 15
  13. If 7x = 35, what’s x?
      Answer: 5
  14. What’s 50 more than 8 dozen?
      Answer: 146
  15. I spent $100. $50 on clothes, $30 on books. How much left?
      Answer: $20

Mathematics Logical Questions with Answers

  1. If some birds can fly and penguins are birds, can penguins fly?
      Answer: No
  2. Two fathers and two sons go fishing. They catch 3 fish and take one each. How?
      Answer: Grandfather, father, son
  3. A number divided by 2 is the same as subtracting 10. What’s the number?
      Answer: 20
  4. If 9 + 5 = 2, what time is it?
      Answer: 2 o’clock
  5. A book costs $1 plus half its price. What’s the total cost?
      Answer: $2
  6. John is 10 years older than his brother. In 10 years, he’ll be twice his age. How old is John now?
      Answer: 20
  7. You walk into a room with 2 dogs, 4 cats and a bird. How many legs are in the room?
      Answer: 20
  8. If a bat and a ball cost $1.10 and bat is $1 more, what’s the ball’s price?
      Answer: 5 cents
  9. I’m a number. Multiply by 3 and subtract 3. The result is 0. What am I?
      Answer: 1
  10. A square has 4 equal sides. If each side is 5 cm, what’s the perimeter?
      Answer: 20 cm
  11. If Monday is the first day, what is the 10th day?
      Answer: Wednesday
  12. 10 birds sit on a fence. 3 fly away. How many are left?
    Answer: 10
  13. A man has 53 socks in a drawer: 21 black, 15 blue and 17 red. What’s the minimum he must pull to guarantee a match?
      Answer: 4
  14. There are 3 switches downstairs and 1 bulb upstairs. How to find the right switch by going upstairs once?
      Answer: Turn on two, turn one off, feel the bulb
  15. Which weighs more: a pound of feathers or a pound of bricks?
      Answer: Neither

Conclusion

Math riddles are a great way to make learning fun. They help you think fast and solve problems in a smart way. These riddles related to maths with answers make tough math feel easy.

Some are silly with funny math solutions, while others are tricky like complex math riddle problems. If you enjoy brain games, try logic riddles math or math riddles for adults with answers.

These riddles for mathematics use fun ways to learn. You’ll also love solving number riddles with answers, riddles using numbers, and clever riddles mathematical. Keep playing and learning with more math riddles every day!

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