Best 115+ Riddles About Numbers (With Answers)

Are you ready to test your wits with some brain-teasing number riddles? Whether you’re a math lover or just enjoy a good puzzle,

this collection of 117 riddles about numbers is sure to challenge your logic and tickle your brain. Plus, each riddle comes with an answer so you can check your skills or stump your friends. Let’s get started!

Easy Riddles About Numbers

1. I am an odd number. Take away one letter, and I become even. What number am I?
   Answer: Seven.
2. What number can you multiply by itself and still get the same result?
   Answer: One.
3. What has hands but cannot count?
   Answer: A clock.
4. What number comes before 22 but after 20?
   Answer: 21.
5. If you divide me by 2, multiply me by 4, and subtract 6, I stay the same. What am I?
   Answer: Six.

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Riddles About Odd and Even Numbers

6. I am a number. When you divide me by 2, you get an odd number. What am I?
   Answer: An odd number.
7. What’s the only even prime number?
   Answer: Two.
8. I am an odd number less than 10 but greater than 5. What am I?
   Answer: Seven or nine.
9. What number is neither odd nor even?
   Answer: Zero.
10. Add me to myself, and you get eight. Subtract me from myself, and you get four. What number am I?
    Answer: Six (riddle assumes “me” as two steps ahead).

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Riddles About Arithmetic

11. What number do you get if you divide 30 by half and add 10?
    Answer: 70.
12. I am the product of two numbers that are both the same, but I’m smaller than 10. What am I?
    Answer: Four (2 x 2).
13. Take my digits, add them together, and multiply the result by 3. You’ll get me. What number am I?
    Answer: 12 (1+2=3, 3×3=9).
14. If you multiply me by myself, you’ll get 81. What am I?
    Answer: Nine.
15. What’s the square root of 144?
    Answer: Twelve.

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Riddles About Patterns

16. What’s the next number in the sequence: 1, 3, 6, 10, 15…?
    Answer: 21 (Triangular numbers).
17. I’m a number that’s always followed by 11, but never precedes 12. What am I?
    Answer: 10 (in number sequences).
18. What comes after: 2, 4, 8, 16…?
    Answer: 32 (doubling sequence).
19. What comes next in this series: 1, 4, 9, 16…?
    Answer: 25 (perfect squares).
20. Find the missing number: 2, 5, 10, 17, 26, ?
    Answer: 37 (add consecutive odd numbers).

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Riddles About Money and Numbers

21. I am worth five dimes and five nickels. What am I?
    Answer: One dollar.
22. How many pennies are in $1.25?
    Answer: 125 pennies.
23. If you spend 50 cents, you’ll have half of me left. What am I?
    Answer: One dollar.
24. What is one-fifth of $10?
    Answer: $2.
25. I am a bill that’s more than $1 but less than $20. What am I?
    Answer: $5, $10, or $15.

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Math-Based Riddles

26. If two’s company and three’s a crowd, what are four and five?
    Answer: Nine.
27. I’m a number less than 100 but divisible by 2, 3, and 5. What am I?
    Answer: 30.
28. What is the sum of the angles of a triangle?
    Answer: 180 degrees.
29. What is the smallest three-digit number?
    Answer: 100.
30. What number comes next in this sequence: 101, 103, 107, 109…?
    Answer: 113 (prime numbers).

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Riddles for Kids

31. What has six faces but cannot smile?
    Answer: A dice.
32. If I have four apples and you take away two, how many apples do I have?
    Answer: Two (you took them).
33. What comes between 8 and 10 but isn’t 9?
    Answer: 8.5 (decimal format).
34. What is a number that looks the same upside down?
    Answer: 8.
35. What’s a number that has two zeros in it?
    Answer: 100.

Brain-Teasing Riddles About Numbers

36. I am a three-digit number. My tens digit is five more than my ones digit, and my hundreds digit is eight less than my tens digit. What number am I?
    Answer: 194.
37. I am a number. Double me and add 10, and you’ll get 50. What am I?
    Answer: 20.
38. I am a number that is four times the sum of my digits. What am I?
    Answer: 36.
39. I’m a number you get when you multiply 7 by 6 and then subtract 2. What am I?
    Answer: 40.
40. What number lies halfway between 10 and 100?
    Answer: 55.

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Fun Riddles About Numbers

41. What number has no value when placed at the beginning but is powerful at the end?
    Answer: Zero.
42. I am a two-digit number. My digits add up to 9, and when reversed, I am still divisible by 9. What am I?
    Answer: 81.
43. What number has the same number of letters as its value?
    Answer: Four.
44. What number can you spell backward and forward and still get the same result?
    Answer: 121 (a palindrome).
45. I’m an odd number that becomes even when you remove one letter. What am I?
    Answer: Seven.

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Riddles About Roman Numerals

46. In Roman numerals, what is half of X?
    Answer: V.
47. What Roman numeral is the same backward and forward?
    Answer: IX.
48. What is the sum of I, II, and III in Roman numerals?
    Answer: VI.
49. What is XL in Roman numerals?
    Answer: 40.
50. If you add L to IX in Roman numerals, what do you get?
    Answer: LIX (59).

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Challenging Riddles About Numbers

51. What is the only number spelled with its letters in alphabetical order?
    Answer: Forty.
52. What is the only number spelled with its letters in reverse alphabetical order?
    Answer: One.
53. I am a number less than 50. I am a square number and my digits add up to 9. What am I?
    Answer: 36.
54. What is the smallest number that is the product of three different prime numbers?
    Answer: 30.
55. I am an odd number, but if you remove my last letter, I become even. What am I?
    Answer: Seven.

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Riddles About Numbers in Everyday Life

56. How many months in a year have 28 days?
    Answer: All 12 months.
57. If you buy 3 oranges for $1 and you have $10, how many oranges can you buy?
    Answer: 30.
58. How many seconds are there in a day?
    Answer: 86,400 seconds.
59. What number do you get if you subtract 1 from the largest two-digit number?
    Answer: 98.
60. What’s the maximum number of times you can subtract 5 from 25?
    Answer: Once (after that, it’s no longer 25).

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Math and Puzzle-Based Riddles

61. I’m a three-digit number. My digits add up to 15, and my tens digit is twice my ones digit. What am I?
    Answer: 372.
62. If I multiply myself by 4 and subtract 6, I’m still a multiple of 6. What number am I?
    Answer: 6.
63. The sum of two numbers is 20, and their difference is 8. What are the two numbers?
    Answer: 14 and 6.
64. What number am I? I am greater than 40 and less than 50, and my digits add up to 12.
    Answer: 48.
65. What number is 10 times itself minus 9?
    Answer: 1 (10×1 – 9 = 1).

More Riddles About Numbers

66. I am a number. If you square me and subtract 1, you get 15. What am I?
    Answer: 4 (4² – 1 = 15).
67. If two’s company and three’s a crowd, what is four and five?
    Answer: Nine.
68. I am a number that increases by one every time you say my name. What am I?
    Answer: Count.
69. Double me, add 10, and divide by 4 to get 15. What am I?
    Answer: 25.
70. What number has three digits and is the same upside down and right side up?
    Answer: 818.

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Creative Riddles About Numbers

71. I am a number that’s the product of my digits, and I’m greater than 10 but less than 20. What am I?
    Answer: 12 (1 × 2 = 2).
72. If you spell out numbers, what is the first number that includes the letter “A”?
    Answer: One thousand.
73. I am a two-digit number. My tens digit is three times my ones digit. What am I?
    Answer: 30.
74. Add me to myself and divide by 4, then subtract 6 to get zero. What am I?
    Answer: 12.
75. What number is 20% of 50?
    Answer: 10.

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Riddles About Fractions and Decimals

76. I am half of a half of a half. What am I?
    Answer: One-eighth.
77. If you divide me by 2, I remain the same. What am I?
    Answer: Zero.
78. What fraction of 100 is 25?
    Answer: One-fourth (1/4).
79. If you add 0.5 to me three times, you’ll get 2. What am I?
    Answer: 0.5.
80. What decimal is equivalent to one-tenth?
    Answer: 0.1.

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Riddles About Time and Numbers

81. If you add 1 hour to 11:59 AM, what time is it?
    Answer: 12:59 PM.
82. How many seconds are in one minute multiplied by three?
    Answer: 180 seconds.
83. I am a number that represents the hours in a day. What am I?
    Answer: 24.
84. If you take 60 seconds and multiply by 60 minutes, what number do you get?
    Answer: 3600 (seconds in an hour).
85. What number represents the days in a leap year?
    Answer: 366.

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Historical Riddles About Numbers

86. What year is considered the start of the 21st century?
    Answer: 2001.
87. How many years are in a century?
    Answer: 100.
88. What number is the Roman numeral “C”?
    Answer: 100.
89. What number is the Roman numeral “D”?
    Answer: 500.
90. How many years are in a millennium?
    Answer: 1,000.

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Advanced Math Riddles

91. If the sum of my digits is 9 and I’m a two-digit number, what could I be?
    Answer: 18, 27, 36, 45, 54, 63, 72, 81, or 90.
92. If I’m multiplied by 11, I become 121. What am I?
    Answer: 11.
93. I am a number that is divisible by both 4 and 6. What am I?
    Answer: 12.
94. What number is both the sum and product of three and three?
    Answer: Six.
95. If you multiply me by 3 and subtract 2, you’ll get 10. What am I?
    Answer: Four.

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Fun Trivia-Based Riddles

96. What number is on the opposite side of 6 on a standard die?
    Answer: One.
97. How many sides does a hexagon have?
    Answer: Six.
98. What is the total number of fingers on two hands?
    Answer: Ten.
99. How many zeros are in one thousand?
    Answer: Three.
100. What is the sum of the first five positive integers?
     Answer: 15.

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Logical Riddles About Numbers

101. If two is company and three is a crowd, what is ten plus one?
     Answer: Eleven.
102. What number is greater than zero but less than one?
     Answer: Any fraction or decimal like 0.5.
103. If three cats catch three mice in three minutes, how many cats are needed to catch 100 mice in 100 minutes?
     Answer: Three.
104. What’s the only number that is both square and cubic?
     Answer: One.
105. If you double me, I become 16. What am I?
     Answer: Eight.

More Mind-Boggling Riddles About Numbers

106. I am a number that is divisible by both 2 and 3, but not 4. What number am I?
     Answer: 6.
107. If you subtract me from 50, the result is 35. What number am I?
     Answer: 15.
108. I am a prime number between 50 and 60. What number am I?
     Answer: 53.
109. What number do you get when you multiply all the numbers on a standard phone’s keypad?
     Answer: 0 (since the keypad has a 0).
110. If you divide me by 5, you get a prime number. What number am I?
     Answer: 25 (25 ÷ 5 = 5, which is prime).

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Number Riddles for All Ages

111. I am an even number, and my tens digit is double my ones digit. What number am I?
     Answer: 42.
112. I am a number that is the sum of three consecutive numbers. What number am I?
     Answer: 6 (1 + 2 + 3 = 6).
113. What number is between 50 and 60, divisible by 2 and 3, but not by 4?
     Answer: 54.
114. If you subtract 10 from me, I will become 90. What am I?
     Answer: 100.
115. I am a number with three digits. The sum of my digits is 12, and my hundreds digit is 5 more than my ones digit. What am I?
     Answer: 582.

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Riddles for Advanced Thinkers

116. If the sum of the squares of two numbers is 130, and their product is 36, what are the numbers?
     Answer: 10 and 6.
117. I am the smallest number that can be written as the sum of two squares in two different ways. What number am I?
     Answer: 50 (50 = 1² + 7² = 5² + 5²).

Conclusion

That’s it for our list of 117 riddles about numbers (with answers)! Whether you’re looking for a fun activity, a way to challenge your mind, or just a bit of entertainment,

these riddles have you covered. Which one was your favorite? Share it with your friends and see if they can crack the code!