Welcome to our biggest math challenge yet! These math riddles turn numbers into brain teasers, so grab a pencil, take your time, and see how many you can solve before peeking at the answers.
150 Math Riddles Riddles
Double me and add 6 to get 20. What number am I?
Answer: 7.
Triple me and take away 5 to get 16. What number am I?
Answer: 7.
Half of me plus 9 equals 17. What number am I?
Answer: 16.
Add 14 to me and you get 31. What number am I?
Answer: 17.
Multiply me by 4 and subtract 3 to get 25. What number am I?
Answer: 7.
Take 8 from me and you get 12. What number am I?
Answer: 20.
Double me, then add 10, and you get 30. What number am I?
Answer: 10.
Triple me and add 4 to get 25. What number am I?
Answer: 7.
Divide me by 3 and add 2 to get 9. What number am I?
Answer: 21.
Multiply me by 5 and take away 7 to get 18. What number am I?
Answer: 5.
Add 25 to me and you get 60. What number am I?
Answer: 35.
Half of me minus 4 equals 11. What number am I?
Answer: 30.
Multiply me by 6 and add 2 to get 44. What number am I?
Answer: 7.
Subtract 17 from me and you get 9. What number am I?
Answer: 26.
Double me and take away 9 to get 15. What number am I?
Answer: 12.
Triple me and subtract 8 to get 19. What number am I?
Answer: 9.
Add 19 to me and you get 45. What number am I?
Answer: 26.
Multiply me by 8 and take away 6 to get 50. What number am I?
Answer: 7.
Divide me by 4 and add 5 to get 12. What number am I?
Answer: 28.
Add 33 to me and you get 71. What number am I?
Answer: 38.
Double me, add 4, and you get 22. What number am I?
Answer: 9.
Multiply me by 3 and add 11 to get 32. What number am I?
Answer: 7.
Take 15 from me and you get 24. What number am I?
Answer: 39.
Half of me plus 12 equals 20. What number am I?
Answer: 16.
Multiply me by 9 and subtract 4 to get 50. What number am I?
Answer: 6.
What number comes next in this pattern: 2, 4, 6, 8?
Answer: 10.
What number comes next in this pattern: 5, 10, 15, 20?
Answer: 25.
What number comes next in this pattern: 3, 6, 9, 12?
Answer: 15.
What number comes next in this pattern: 1, 2, 4, 8?
Answer: 16.
What number comes next in this pattern: 10, 9, 8, 7?
Answer: 6.
What number comes next in this pattern: 1, 4, 9, 16?
Answer: 25.
What number comes next in this pattern: 2, 6, 18, 54?
Answer: 162.
What number comes next in this pattern: 100, 90, 80, 70?
Answer: 60.
What number comes next in this pattern: 7, 14, 21, 28?
Answer: 35.
What number comes next in this pattern: 1, 3, 6, 10, 15?
Answer: 21.
What number comes next in this pattern: 50, 45, 40, 35?
Answer: 30.
What number comes next in this pattern: 2, 3, 5, 8, 13?
Answer: 21.
What number comes next in this pattern: 4, 8, 12, 16?
Answer: 20.
What number comes next in this pattern: 1, 1, 2, 3, 5, 8?
Answer: 13.
What number comes next in this pattern: 11, 22, 33, 44?
Answer: 55.
What number comes next in this pattern: 3, 9, 27, 81?
Answer: 243.
What number comes next in this pattern: 20, 18, 16, 14?
Answer: 12.
What number comes next in this pattern: 1, 5, 9, 13, 17?
Answer: 21.
What number comes next in this pattern: 64, 32, 16, 8?
Answer: 4.
What number comes next in this pattern: 2, 5, 10, 17, 26?
Answer: 37.
I am a two-digit number. My digits add up to 9, and my first digit is double my second digit. What number am I?
Answer: 63.
I am a two-digit number. My digits add up to 14, my first digit is 2 more than my second digit, and I am an even number. What number am I?
Answer: 86.
What two-digit number looks the same when you flip it upside down?
Answer: 69.
Add my digits together and you get 7. I am between 40 and 50. What number am I?
Answer: 43.
I am a three-digit number. My hundreds digit is 2, my tens digit is double my hundreds digit, and my ones digit is half my tens digit. What number am I?
Answer: 242.
What is the smallest two-digit number whose digits add up to 5?
Answer: 14.
My digits multiply to 12 and add up to 7. I am a two-digit number less than 50. What number am I?
Answer: 34.
What number do you get when you write the number 7 three times in a row?
Answer: 777.
I am a two-digit number. Reverse my digits and I grow by 9. My two digits add up to 11. What number am I?
Answer: 56.
What is the largest three-digit number with all different digits?
Answer: 987.
My digits add up to 15. I am a two-digit number and my first digit is 3 more than my second digit. What number am I?
Answer: 96.
How many digits are in the number one million?
Answer: 7.
I am an even number between 30 and 40. My digits add up to 9. What number am I?
Answer: 36.
What is the smallest three-digit number with all different digits?
Answer: 102.
Add 1 to me and I become 100. What number am I?
Answer: 99.
Mia is 8 years old. Her brother is twice her age. How old is her brother?
Answer: 16.
A dad is 36 years old and his son is 9. How many times older is the dad than his son?
Answer: 4 times.
Sara is 12 years old. In 6 years, how old will she be?
Answer: 18.
Tom is 5 years old. His sister is 3 years older than him. How old is his sister?
Answer: 8.
Ben is 10 years old. His dad is 4 times his age. How old is his dad?
Answer: 40.
Lily is 7 years old. Her mom is 5 times her age. How old is her mom?
Answer: 35.
Jack is 14 years old. His little brother is half his age. How old is his little brother?
Answer: 7.
A teacher is 28 years old and her student is 8. How old was the teacher when the student was born?
Answer: 20.
Emma is 9 years old. Her cousin is 3 years younger than her. How old is her cousin?
Answer: 6.
Noah is 6 years old. In 10 years his dad will be 45. How old is his dad now?
Answer: 35.
Ava is 11 years old and her brother is 5 years older. How old is her brother?
Answer: 16.
A mom is 32 years old and her daughter is 8. In how many years will the mom be 3 times the daughter’s age?
Answer: 4 years.
Leo is 4 years old. His grandpa is 15 times his age. How old is his grandpa?
Answer: 60.
Zoe is 15 years old. Her baby brother was born when she was 12. How old is her brother now?
Answer: 3.
Max is 18 years old. His sister is one third his age. How old is his sister?
Answer: 6.
There are 4 baskets with 6 apples in each basket. How many apples are there in all?
Answer: 24.
You share 20 cookies equally among 5 friends. How many cookies does each friend get?
Answer: 4.
A classroom has 6 rows of 5 desks. How many desks are there in all?
Answer: 30.
Sara has 3 packs of pencils with 8 pencils in each pack. How many pencils does she have?
Answer: 24.
There are 12 cupcakes and 3 children. If the cupcakes are shared equally, how many does each child get?
Answer: 4.
A farmer has 7 chickens. Each chicken lays 2 eggs a day. How many eggs does the farmer get in one day?
Answer: 14.
You have 48 stickers to share equally among 8 friends. How many stickers does each friend get?
Answer: 6.
A box holds 9 crayons. How many crayons are in 4 boxes?
Answer: 36.
There are 5 tables with 4 chairs at each table. How many chairs are there in all?
Answer: 20.
Tom reads 6 pages a day. How many pages does he read in 7 days?
Answer: 42.
A pizza has 12 slices. 4 friends share it equally. How many slices does each friend get?
Answer: 3.
Mia bakes 3 trays of muffins with 10 muffins on each tray. How many muffins did she bake?
Answer: 30.
There are 9 bags with 7 marbles in each bag. How many marbles are there in all?
Answer: 63.
A school bus has 10 rows with 2 seats in each row. How many seats are on the bus?
Answer: 20.
You have 36 grapes and you eat 6 each day. How many days will the grapes last?
Answer: 6 days.
A gardener plants 8 rows of carrots with 9 carrots in each row. How many carrots did she plant?
Answer: 72.
There are 25 students in a class. The teacher splits them into 5 equal groups. How many students are in each group?
Answer: 5.
Ben buys 4 packs of gum with 5 sticks in each pack. How many sticks of gum does he have?
Answer: 20.
A baker makes 5 dozen cookies. How many cookies is that?
Answer: 60.
There are 11 players on a soccer team. How many players are on 3 teams?
Answer: 33.
What is double 12?
Answer: 24.
What is half of 50?
Answer: 25.
What is double 25?
Answer: 50.
What is half of 84?
Answer: 42.
Double 15 and then add 5. What do you get?
Answer: 35.
Take half of 100, then add 10. What do you get?
Answer: 60.
A number doubled is 36. What is the number?
Answer: 18.
Half of a number is 21. What is the number?
Answer: 42.
Double 9, then double the result again. What do you get?
Answer: 36.
Take half of 80, then half again. What do you get?
Answer: 20.
What is double 33?
Answer: 66.
A frog jumps 3 feet, then its next jump is double the first. How far is the second jump?
Answer: 6 feet.
Double 40 and subtract 10. What do you get?
Answer: 70.
What is half of 96?
Answer: 48.
A plant doubles in height every week. It is 4 inches tall now. How tall will it be in 2 weeks?
Answer: 16 inches.
You have 3 quarters. How many cents do you have?
Answer: 75 cents.
A pencil costs 25 cents. How much do 4 pencils cost?
Answer: 1 dollar.
You pay with a 5-dollar bill for a toy that costs 3 dollars. How much change do you get?
Answer: 2 dollars.
A notebook costs 2 dollars. How much do 5 notebooks cost?
Answer: 10 dollars.
You have 10 dimes. How many dollars is that?
Answer: 1 dollar.
A candy bar costs 50 cents. How much do 6 candy bars cost?
Answer: 3 dollars.
You save 4 dollars each week. How much do you save in 8 weeks?
Answer: 32 dollars.
A ticket costs 7 dollars. How much do 3 tickets cost?
Answer: 21 dollars.
You have a 10-dollar bill and you spend 4 dollars. How much money is left?
Answer: 6 dollars.
How many nickels make 1 dollar?
Answer: 20 nickels.
A juice box costs 1 dollar and a sandwich costs 3 dollars. How much do they cost together?
Answer: 4 dollars.
You have 2 five-dollar bills. How much money do you have?
Answer: 10 dollars.
A toy costs 12 dollars. You pay with a 20-dollar bill. How much change do you get?
Answer: 8 dollars.
You earn 5 dollars a day for 6 days. How much do you earn in all?
Answer: 30 dollars.
A pack of stickers costs 3 dollars. How much do 9 packs cost?
Answer: 27 dollars.
How many sides does a triangle have?
Answer: 3.
How many sides does a hexagon have?
Answer: 6.
A square has 4 sides. How many sides do 3 squares have in all?
Answer: 12.
How many corners does a rectangle have?
Answer: 4.
How many sides does an octagon have?
Answer: 8.
A pentagon has 5 sides. How many sides do 4 pentagons have in all?
Answer: 20.
How many sides do a triangle and a square have together?
Answer: 7.
A cube has 6 faces. How many faces do 2 cubes have?
Answer: 12.
How many sides does a decagon have?
Answer: 10.
What is 15 times 6?
Answer: 90.
What is 9 times 6?
Answer: 54.
What is 12 times 3?
Answer: 36.
What is 100 minus 37?
Answer: 63.
What is 15 plus 27?
Answer: 42.
What is 8 squared?
Answer: 64.
What is the square root of 144?
Answer: 12.
It is 3:00 now. How many minutes are there until 4:00?
Answer: 60 minutes.
There are 7 days in a week. How many days are in 3 weeks?
Answer: 21 days.
There are 12 months in a year. How many months are in 5 years?
Answer: 60 months.
What is 144 divided by 12?
Answer: 12.
What is 25 percent of 80?
Answer: 20.
If today is Tuesday, what day will it be in 7 days?
Answer: Tuesday.
A leap year has 366 days. How many days are in 2 leap years?
Answer: 732 days.
What is the next even number after 47?
Answer: 48.
What is the next odd number after 62?
Answer: 63.
Frequently Asked Questions
Are these math riddles good for a classroom or a party?
Yes, they work great in both places. Teachers can read them out loud for a quick warm-up, and at a party you can take turns guessing or split into teams and keep score.
Are these math riddles hard?
The collection mixes easy, medium, and tricky riddles, so younger kids can enjoy the simple ones while older kids and adults can tackle the harder puzzles. Everyone can find a few that make them think.
Can I share these math riddles with friends?
Of course! Share them with friends, family, or classmates, and challenge each other to solve them without looking at the answers first.
More Riddle Collections
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