Math Riddles for Kids (with Answers)
Updated November 2026 · 9 free printables
"I am between 20 and 30. I am odd. My digits add up to 11. What number am I?" Math riddles turn number sense into a puzzle: each clue rules out some numbers until only one is left. Below are 25 math riddles with answers about numbers, shapes, coins and clocks.
The printable pages cover number riddles for 1st, 2nd and 3rd grade (even and odd, tens and ones, skip counting, multiples and rounding), shape riddles with a picture bank of flat and solid shapes, telling time riddles with clocks to draw on, money riddles with a coin bank, and holiday number riddles for Halloween, Thanksgiving and Christmas. A computer checked every riddle so it has exactly one answer, and each page has an answer key.
25 Math Riddles with Answers
I am between 20 and 30. I am an odd number. My digits add up to 11. What number am I?
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29
I am a 2-digit number. All my digits are the same. I am a multiple of 4. I am less than 50. What number am I?
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44
You say me when you count by 10s. I am between 40 and 60. My digits add up to 5. What number am I?
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50
I am a 2-digit number. My tens digit is 7. My ones digit is bigger than my tens digit. I am an even number. What number am I?
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78
If you add 5 to me, you get 12. I am an odd number. What number am I?
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7
I am between 0 and 10. I am an even number. I am greater than 6. What number am I?
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8
I am a 3-digit number. My hundreds digit is 9. All my digits are the same. What number am I?
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999
I am a multiple of 11. I am between 30 and 40. What number am I?
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33
I am a number times itself, like 3 x 3. I am an odd number. I am between 20 and 30. What number am I?
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25
I am a multiple of 3. I am a multiple of 4. I am between 30 and 40. What number am I?
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36
I am a 2-digit number. My tens digit is 4 more than my ones digit. I am an odd number. My digits add up to 10. What number am I?
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73
Rounded to the nearest ten, I am 70. I am an odd number. I am less than 70. My digits add up to 13. What number am I?
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67
Double me and you get 76. What number am I?
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38
I am a multiple of 4. I am a multiple of 5. I am between 50 and 70. What number am I?
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60
I am a 3-digit number. My digits add up to 1. What number am I?
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100
I am between 10 and 20. I am an odd number. My digits add up to 8. What number am I?
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17
I am a flat shape. I have 4 straight sides. All my sides are the same length. All my corners are square corners. What shape am I?
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square
I am a flat shape. I have 6 straight sides. Bees build their honeycomb cells in my shape. What shape am I?
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hexagon
I am a solid shape you can hold. I can roll. I have no flat faces. A basketball has my shape. What shape am I?
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sphere
I am a flat shape. I have 4 straight sides. All my corners are square corners. Two of my sides are long and two are short. What shape am I?
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rectangle
I am a solid shape you can hold. I have 5 faces. I have 5 corners (vertices). The ancient Egyptians built huge stone tombs in my shape. What shape am I?
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pyramid
I have 2 coins. Together they make 50¢. What coins do I have?
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2 quarters
I have 3 coins. Together they make 15¢. All my coins are the same kind. What coins do I have?
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3 nickels
I have 4 coins. Together they make 100¢. All my coins are the same kind. What coins do I have?
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4 quarters
My short hand is between the 10 and the 11. My long hand points to the 4. What time is it?
Show answer
10:20
All 9 Math Riddles for Kids (with Answers), One by One
Here is a closer look at every page in this collection: what it practices, which grade it fits and a tip for each one. 3 of them belong to a smaller theme and are described there instead.
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1. Number Riddles: What Number Am I? (Grade 1)
6 "What number am I?" riddles for 1st grade: numbers up to 20 with a number line, even and odd, tens and ones and counting by 5s. Every riddle has exactly one answer. Answer key on page 2. First graders can read it on their own and ask for help only with the trickier words. Count rods by tens first, then add the ones.
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2. Number Riddles: What Number Am I? (Grade 2)
8 "What number am I?" riddles for 2nd grade: two-digit numbers, digit sums, place value, skip counting and even and odd. Every riddle has exactly one answer. Answer key on page 2. It fits second grade readers, around ages 7 to 8. Say the number in tens and ones: 47 is 4 tens and 7 ones.
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3. Number Riddles: What Number Am I? (Grade 3)
8 "What number am I?" riddles for 3rd grade: place value to 999, multiples, rounding, square numbers and digit sums. Every riddle has exactly one answer. Answer key on page 2. Third graders can use it for independent reading practice and to look back in the text for evidence. Count rods by tens first, then add the ones.
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4. Shape Riddles: What Shape Am I? (Grade 1)
6 shape riddles with a 12-shape picture bank: flat shapes by sides and corners, and solid shapes by faces, points and rolling. A free 1st grade geometry riddle worksheet with an answer key. First graders can read it on their own and ask for help only with the trickier words.
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5. Telling Time Riddles: What Time Is It? (Grade 2)
6 clock riddles for 2nd grade: read where the short and long hands point, draw the hands on the clock and write the time to the hour, half hour, quarter hour and five minutes. Answer key on page 2. It fits second grade readers, around ages 7 to 8.
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6. Money Riddles: What Coins Do I Have? (Grade 2)
6 coin riddles for 2nd grade: find the pennies, nickels, dimes and quarters from how many coins there are and what they add up to. A coin bank helps; the answer key on page 2 shows the coins. It fits second grade readers, around ages 7 to 8.
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7. Thanksgiving Math Riddles: What Number Am I? (Grade 2)
Download PDF + answer key · View page · More in Thanksgiving Riddles for Kids
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8. Christmas Math Riddles: What Number Am I? (Grade 3)
Download PDF + answer key · View page · More in Christmas Riddles for Kids
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9. Halloween Math Riddles: What Number Am I? (Grade 1)
Download PDF + answer key · View page · More in Halloween Riddles for Kids
Tips for parents and teachers
- Write down every number that fits the first clue, then cross out numbers clue by clue.
- Use a hundreds chart or number line for 2-digit riddles.
- Check the answer against every clue at the end, not just the last one.
Did you know?
- An even number ends in 0, 2, 4, 6 or 8; an odd number ends in 1, 3, 5, 7 or 9.
- A number is a multiple of 9 when its digits add up to a multiple of 9, like 54 (5 + 4 = 9).
- Each riddle on these pages was checked by a computer program to have exactly one answer.
Fun ways to use your printables
- Have your child write a number riddle about their age or house number.
- Play "Guess my number" with yes-or-no questions like "Is it even?"
- Make coin riddles with real coins from a piggy bank.
How to print
Click Download PDF and print at 100% on US Letter or A4 paper. Page 1 is the worksheet and page 2 is the answer key, so choose “page 1” in the print dialog if you only want the practice page. Every worksheet is free for home, homeschool and classroom use, so print as many copies as you need.
Frequently asked questions
How do you solve a "What number am I?" riddle?
Start with the clue that gives the smallest group of numbers, like "I am between 20 and 30," and write those numbers down. Then cross out every number that breaks another clue until only one is left.
What grade are math riddles for?
Our number riddles start in 1st grade with numbers up to 20 and go up to 3-digit numbers, multiples and rounding in 3rd grade. Shape riddles suit 1st grade, and the time and money riddles fit 2nd grade.
Can a math riddle have two answers?
A badly written one can. Every riddle here was checked by a computer program that tried all the possible answers and made sure exactly one fits all the clues.
Do the pages have answer keys?
Yes. Page 2 shows each number in red, the shape names, the clock hands drawn in and the coins for every money riddle.