100+ Fun Number Riddles With Answers to Challenge Your Brain
Are you ready to challenge your brain with some fun and clever number puzzles? 🔢 Number riddles are more than just math; they are a mix of logic, patterns, and problem-solving that can entertain kids, adults, and math enthusiasts alike.
From easy puzzles for young learners to mind-bending challenges for adults and competition-style riddles, there’s something for everyone. These riddles test your critical thinking, improve mental math, and even help with pattern recognition.
Whether you’re solving them alone, with friends, or in a classroom setting, number riddles make learning numbers exciting and interactive. In this article, you’ll discover fun, tricky, hard, and brain-training riddles that will keep your mind sharp and entertained. Let’s dive in and see how many you can solve!
Number Riddles With Answers
1. 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
2. I am an even number. Take away one letter and I become odd. What number am I?
Answer: Seven
3. I am a two-digit number. Both my digits are the same, and when multiplied together, they equal 16. What number am I?
Answer: 44
4. I am a number that is double of myself minus 4. What number am I?
Answer: 4
5. I am a number less than 10. Multiply me by myself and subtract me, and you get 0. What number am I?
Answer: 1
6. I am a number that is 3 more than my half. What number am I?
Answer: 6
7. I am a two-digit number. Add my digits and multiply by 2 to get 12. What number am I?
Answer: 36
8. I am a number. Add me to 11, subtract 5, multiply by 2, and you get 24. What number am I?
Answer: 6
9. I am a number whose square is equal to the sum of my digits squared plus twice my number. What number am I?
Answer: 5
10. I am the smallest number divisible by both 2 and 3. What number am I?
Answer: 6
11. I am a number. Multiply me by 3 and add 9 to get 30. What number am I?
Answer: 7
12. I am a number. Subtract 3 from me, multiply by 2, and you get 14. What number am I?
Answer: 10
Easy Number Riddles for Kids
13. I am the number after 4. What am I?
Answer: 5
14. I am the number of legs on a dog. What am I?
Answer: 4
15. I am one more than 9. What am I?
Answer: 10
16. I am the number of months in a year. What am I?
Answer: 12
17. I am half of 10. What am I?
Answer: 5
18. I am the number that comes before 20. What am I?
Answer: 19
19. I am the number of wheels on a bicycle. What am I?
Answer: 2
20. I am the number of sides on a triangle. What am I?
Answer: 3
21. I am the number of fingers on one hand. What am I?
Answer: 5
22. I am the number that comes after 100. What am I?
Answer: 101
23. I am the number of hours in half a day. What am I?
Answer: 12
24. I am the number of days in a week. What am I?
Answer: 7
See also 170+ Riddles for Kids
Number Riddles for Adults
25. I am a two-digit number. If you reverse my digits, I increase by 27. What number am I?
Answer: 36
26. I am a number. Multiply me by 3 and subtract 7 to get 20. What number am I?
Answer: 9
27. I am a number. Half of me plus 5 equals 10. What number am I?
Answer: 10
28. I am a number divisible by 2, 3, and 5. What is the smallest number I can be?
Answer: 30
29. I am a three-digit number. My hundreds digit is twice my ones digit, and the sum of all digits is 9. What number am I?
Answer: 324
30. I am a number. Subtract 15 from me, and you get twice my half. What number am I?
Answer: 30
31. I am a prime number between 50 and 60. What am I?
Answer: 53
32. I am a number. Multiply me by 4, subtract 5, and you get 27. What number am I?
Answer: 8
33. I am a two-digit number. The sum of my digits is 9, and I am divisible by 3. What number am I?
Answer: 36
34. I am a perfect square less than 50. What number am I?
Answer: 36
35. I am a number. Add 15, subtract 5, and multiply by 2 to get 50. What number am I?
Answer: 10
36. I am a number whose digits add up to 11 and multiply to 18. What number am I?
Answer: 29
Funny Number Riddles
37. Why was six afraid of seven?
Answer: Because seven eight (ate) nine!
38. Why did the student eat his homework?
Answer: Because the teacher said it was a piece of cake… with numbers!
39. Why is the number 6 so good at sports?
Answer: Because it’s always in the “middle” of the action!
40. Why did the two fours skip lunch?
Answer: Because they already eight (ate)!
41. Why was the math book sad?
Answer: Because it had too many problems.
42. What did zero say to eight?
Answer: Nice belt!
43. Why did seven go to the beach?
Answer: To have some “sandy” digits!
44. What did one math book say to the other?
Answer: Don’t bother me, I’m full of problems.
45. Why did the number 10 break up with 7?
Answer: It found 7 too odd.
46. Why was the fraction nervous about marrying the decimal?
Answer: Because he would have to convert!
47. Why did the number 2 go to therapy?
Answer: It couldn’t deal with being squared!
48. What is a math teacher’s favorite place in NYC?
Answer: Times Square!
Tricky Number Riddles
49. I am a two-digit number. If you reverse my digits, I decrease by 9.
Answer: 54
50. I am a number. Multiply me by 2, add 8, then divide by 2, and you get 10.
Answer: 6
51. I am a three-digit number. The sum of my digits is 12, and my hundreds digit is 3 more than my ones digit.
Answer: 561
52. I am a number. Take half of me, add 10, and the result is 40.
Answer: 60
53. I am a number divisible by 3 and 4 but not by 6. What is the smallest number I can be?
Answer: 12
54. I am a number. Multiply me by 5, subtract 10, and the answer is 40.
Answer: 10
55. I am a two-digit number. One digit is twice the other, and the sum of the digits is 12.
Answer: 48
56. I am a number. Add me to 15, divide by 3, and the result is 10.
Answer: 15
57. I am a perfect square between 30 and 50.
Answer: 36
58. I am a two-digit number divisible by both 2 and 5. The sum of my digits is 7.
Answer: 25
59. I am a number. Multiply me by 4, subtract 8, and the answer is 20.
Answer: 7
60. I am a number between 50 and 60. My digits add up to 11.
Answer: 56
Hard Number Riddles
61. I am a three-digit number. My tens digit is double my ones digit, and my hundreds digit is one less than my tens digit.
Answer: 121
62. I am a number. Add my square to myself, and you get 56.
Answer: 7
63. I am a number. Multiply me by 3, subtract my half, and you get 27.
Answer: 6
64. I am a four-digit number. My digits add up to 10, and the thousands digit is 3. What number could I be?
Answer: 3016
65. I am a number divisible by 7, 11, and 13. What is the smallest number I can be?
Answer: 1001
66. I am a two-digit number. If you add the digits together and multiply by 4, you get the number itself.
Answer: 36
67. I am a number. Take me, double me, add 5, and you get 29.
Answer: 12
68. I am a number. Subtract 9, divide by 2, and you get 7.
Answer: 23
69. I am a number whose square is less than 50 but more than 40.
Answer: 7
70. I am a number. Multiply me by 5, subtract 12, and you get 63.
Answer: 15
71. I am a three-digit number. The hundreds digit is half the sum of the other two digits.
Answer: 132
72. I am a number. Multiply me by 6, add 14, and divide by 2 to get 50.
Answer: 18
See also 160+ Riddles for Adults With Answers
Number Puzzles and Patterns
73. What comes next in the sequence: 2, 4, 8, 16, …?
Answer: 32
74. Find the missing number: 5, 10, 20, 40, ?
Answer: 80
75. What comes next: 1, 1, 2, 3, 5, 8, …?
Answer: 13 (Fibonacci sequence)
76. Find the missing number: 2, 6, 12, 20, …?
Answer: 30
77. What is the next number in the pattern: 3, 6, 9, 12, …?
Answer: 15
78. Complete the sequence: 1, 4, 9, 16, 25, …
Answer: 36
79. What comes next: 2, 5, 10, 17, …?
Answer: 26
80. Find the missing number: 10, 20, 40, 80, ?
Answer: 160
81. What comes next: 1, 2, 4, 7, 11, …?
Answer: 16
82. Complete the pattern: 1, 2, 4, 8, 16, …
Answer: 32
83. Find the missing number: 2, 3, 5, 8, 12, …
Answer: 17
84. What comes next: 1, 3, 6, 10, 15, …?
Answer: 21
Number Riddles for Brain Training
85. I am a two-digit number. Subtract the sum of my digits from me, and the result is 36. What number am I?
Answer: 63
86. I am a number. Multiply me by 3, subtract 2, and you get 16. What number am I?
Answer: 6
87. I am a three-digit number. My hundreds digit is twice my ones digit, and the sum of my digits is 9. What number am I?
Answer: 324
88. I am a number. Divide me by 2, add 15, and you get 25. What number am I?
Answer: 20
89. I am a number divisible by both 4 and 6 but not by 8. What is the smallest number I can be?
Answer: 12
90. I am a number. Multiply me by 5, subtract 7, and the result is 33. What number am I?
Answer: 8
91. I am a two-digit number. The difference between my digits is 3, and the sum of my digits is 11. What number am I?
Answer: 74
92. I am a number. Add 12, multiply by 2, and you get 64. What number am I?
Answer: 20
93. I am a square number between 50 and 100. What number am I?
Answer: 64
94. I am a number. Take me, double me, add 9, and the result is 33. What number am I?
Answer: 12
95. I am a number divisible by 2, 3, and 5. What is the smallest number I can be?
Answer: 30
96. I am a number whose digits add up to 14 and multiply to 40. What number am I?
Answer: 58
See also 70+ Dark Riddles With Answers
Number Riddles for Competitions
97. I am a number. Multiply me by 7, subtract 5, and the answer is 48. What number am I?
Answer: 53/7 (approx. 7 for timed challenges)
98. I am a prime number between 40 and 60. What number am I?
Answer: 41, 43, 47, 53, or 59
99. I am a two-digit number. Twice the sum of my digits equals my number. What number am I?
Answer: 18
100. I am a number. Multiply me by 4, add 12, and divide by 2 to get 28. What number am I?
Answer: 22
101. I am a perfect square between 90 and 130. What number am I?
Answer: 100 or 121
102. I am a two-digit number divisible by 9. What is the largest number I can be?
Answer: 99
103. I am a number. Multiply me by 3, subtract 9, and you get 24. What number am I?
Answer: 11
104. I am a number. Add my digits together, multiply by 3, and you get 36. What number am I?
Answer: 45
105. I am a three-digit number. My hundreds digit is equal to the sum of the other two digits. What number could I be?
Answer: 121, 132, 213, etc.
106. I am a number whose digits add up to 10 and multiply to 21. What number am I?
Answer: 37
107. I am a number. Divide me by 5, add 7, and the result is 20. What number am I?
Answer: 65
108. I am a number. Multiply me by 6, subtract 8, and you get 40. What number am I?
Answer: 8
See also Riddles Generator
FAQs
Conclusion
Number riddles are a fun way to exercise your brain while exploring the world of numbers, patterns, and logic. 🧠 From easy riddles for kids to hard puzzles for adults, these challenges encourage critical thinking, problem-solving, and creativity. They are perfect for classroom activities, competitions, or casual fun at home, making math enjoyable and interactive.
By practicing these riddles, you can strengthen your mental agility and learn to spot patterns more quickly. Keep solving, keep challenging yourself, and remember every number puzzle is an opportunity to boost your brainpower. Now it’s your turn: try some riddles, share them with friends, and see how clever you really are!
