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Math Riddles



A collection of Math Riddles for fun and pleasure! Tease your brain with these riddles, then click click for answer to show or hide the answer. (Note: You may need to enable JavaScript on your browser for the answers to show properly.)

Also visit our Math Trivia page for more arithmetic riddles, algebra riddles, geometry riddles, statistics riddles etc.

  1. Why should you never mention the number 288 in front of anyone? click for answer

  2. Which weighs more?  A pound of iron or a pound of feathers? click for answer

  3. How is the moon like a dollar? click for answer

  4. What is alive and has only 1 foot? click for answer

  5. When do giraffes have 8 feet? click for answer

  6. How many eggs can you put in an empty basket? click for answer

  7. What coin doubles in value when half is deducted? click for answer

  8. What is the difference between a new penny and an old quarter? click for answer

  9. If you can buy eight eggs for 26 cents, how many can you buy for a cent and a quarter? click for answer

  10. Where can you buy a ruler that is 3 feet long? click for answer



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  12. If there were 9 cats on a bridge and one jumped over the edge, how many would be left? click for answer

  13. If you take three apples from five apples, how many do you have? click for answer

  14. What has 4 legs and only 1 foot? click for answer

  15. How many times can you subtract 6 from 30? click for answer

  16. If one nickel is worth five cents, how much is half of one half of a nickel worth? click for answer

  17. How many 9's between 1 and 100? click for answer

  18. Which is more valuable - one pound of $10 gold coins or half a pound of $20 gold coins? click for answer

  19. It happens once in a minute, twice in a week, and once in a year. What is it? click for answer

  20. How can half of 12 be 7? click for answer

  21. When things go wrong, what can you always count on? click for answer




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  23. Which month has 28 days? click for answer

  24. What’s the easiest way to double your money? click for answer

  25. What occurs twice in a week, once in a year but never in a day? click for answer

  26. Where do fish keep their money? click for answer

  27. Why is the longest human nose on record only 11 inches long? click for answer

  28. Why are diapers like 100 dollar bills? click for answer

  29. A street that is 40 yards long has a tree every 10 yards on both sides. How many trees are there on the entire street? click for answer

  30. What goes up and never comes down? click for answer

  31. What did one math book say to the other math book? click for answer

  32. I am an odd number; take away a letter and I become even. What number am I? click for answer


  33. As I was going to St. Ives
    I met a man with seven wives.
    Each wife had seven sacks,
    Each sack had seven cats,
    Each cat had seven kits;
    Kits, cats, sacks and wives,
    How many were going to St. Ives? click for answer


  34. You want to cross a bridge to get to the other side of the crevice, but there's a problem. The bridge, which takes an hour to walk across, is guarded in the middle by a guard who wakes up every half hour and carries back anybody crossing the bridge back to where he or she came from. How long does it take for me to get to the other side? click for answer




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  36. What are the 10 types of people in the world? click for answer

  37. Why didn't the quarter roll down the hill with the nickel? click for answer

  38. What happened to the plant in math class? click for answer

  39. Why did the chicken cross the mobius strip? click for answer

  40. Why did I divide sin by tan? click for answer

  41. Where do math teachers go on vacation? click for answer

  42. What do you call a number that can't keep still? click for answer

  43. Why did the mutually exclusive events break up? click for answer

  44. How does a mathematician induce good behavior in her children? click for answer

  45. How do you know when you've reached your Math Professors voice-mail? click for answer






  46. Why did the 30-60-90 triangle marry the 45-45-90 triangle? click for answer

  47. Why didn't the Romans find algebra very challenging? click for answer

  48. Why couldn't the angle get a loan? click for answer

  49. What do you call an angle that is adorable? click for answer

  50. What do you call a destroyed angle? click for answer

  51. Why did the student get upset when his teacher called him average? click for answer

  52. Why does nobody talk to circles? click for answer

  53. Which triangles are the coldest? click for answer

  54. What do you call a dead parrot? click for answer

  55. What's the difference between a diameter and a radius? click for answer

  56. How do deaf mathematicians communicate? click for answer

  57. What do organic mathematicians throw into their fireplaces? click for answer

  58. Why shouldn't you argue with a decimal? click for answer

  59. How many mathematicians does it take to change a light bulb? click for answer

  60. Why did the chicken cross the road? click for answer

  61. What did the circle say to the tangent line? click for answer

  62. Why do mathematicians like parks? click for answer

  63. What kind of tree could a math teacher climb? click for answer



 

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