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
  11. If there were 9 cats on a bridge and one jumped over the edge, how many would be left? click for answer
  12. If you take three apples from five apples, how many do you have? click for answer
  13. What has 4 legs and only 1 foot? click for answer
  14. How many times can you subtract 6 from 30? click for answer
  15. If one nickel is worth five cents, how much is half of one half of a nickel worth? click for answer
  16. How many 9's between 1 and 100? click for answer
  17. Which is more valuable - one pound of $10 gold coins or half a pound of $20 gold coins? click for answer
  18. It happens once in a minute, twice in a week, and once in a year. What is it? click for answer
  19. How can half of 12 be 7? click for answer
  20. When things go wrong, what can you always count on? click for answer

  21. Which month has 28 days? click for answer
  22. What’s the easiest way to double your money? click for answer
  23. What occurs twice in a week, once in a year but never in a day? click for answer
  24. Where do fish keep their money? click for answer
  25. Why is the longest human nose on record only 11 inches long? click for answer

  26. Why are diapers like 100 dollar bills? click for answer
  27. 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
  28. What goes up and never comes down? click for answer
  29. What did one math book say to the other math book? click for answer
  30. I am an odd number; take away a letter and I become even. What number am I? click for answer

  31. 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

  32. 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

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

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