Looking for a fun way to challenge your brain while sharpening your math skills? You’re in the right place!
These math riddles for 7th graders are designed to make learning exciting and interactive.
If you love solving puzzles after school or enjoy friendly competitions with your classmates, these riddles will keep you thinking and laughing at the same time.
We’ve crafted them to match your level, so they’re neither too easy nor too tricky—just perfect for sparking curiosity and boosting your problem-solving skills. Get ready to think creatively and have fun with numbers!
Let’s dive in!
Number Logic Riddles for 7th Graders
- I am an odd number. Remove one letter and I become even. What number am I?
Answer: Seven - What three-digit number reads the same upside down?
Answer: 101 - What number increases when you flip it upside down?
Answer: 6 (becomes 9) - I am the product of all numbers. What am I?
Answer: Zero - What number becomes smaller when you turn it around?
Answer: 9 (becomes 6) - What number looks the same forward, backward, and upside down?
Answer: 0 - I’m a number that’s the same in Roman and Arabic systems. What am I?
Answer: I (1) - I come once in a minute, twice in a moment, but never in a thousand years.
Answer: The letter M (not a number, but a logic puzzle) - What two numbers multiply to 36 but add to 13?
Answer: 9 and 4 - I’m less than 10 and more than 5. Multiply me by 3 and you get 21.
Answer: 7 - What number finishes this pattern? 2, 4, 6, 8, __
Answer: 10 - What number is half of 12 but twice of 3?
Answer: 6 - I am an even number. Take away one letter and I become odd.
Answer: Seven (again, clever wordplay) - When you divide me by myself, you get 1. When you add me to myself, you get 2.
Answer: 1 - What number is always found in the middle of math?
Answer: The letter “A”
Algebra Riddles for 7th Graders
- If x + 10 = 25, what is x?
Answer: 15 - If 3x = 27, what is x?
Answer: 9 - If 5 + y = 12, what is y?
Answer: 7 - If 2a – 4 = 10, what is a?
Answer: 7 - If 8 + n = 20, what is n?
Answer: 12 - If 4p = 48, what is p?
Answer: 12 - If t – 9 = 4, what is t?
Answer: 13 - If 2x + 6 = 20, what is x?
Answer: 7 - If 15 = k + 8, what is k?
Answer: 7 - If 9x = 81, what is x?
Answer: 9 - If 6y – 12 = 18, what is y?
Answer: 5 - If x/3 = 7, what is x?
Answer: 21 - If m + m = 50, what is m?
Answer: 25 - If 2b + 4 = 18, what is b?
Answer: 7 - If 10x = 70, what is x?
Answer: 7
Geometry Riddles for 7th Graders
- I have three sides and three angles. What am I?
Answer: Triangle - I have four equal sides and four right angles.
Answer: Square - I have no sides and no corners.
Answer: Circle - What shape has five sides?
Answer: Pentagon - What shape has six sides?
Answer: Hexagon - What shape has eight sides?
Answer: Octagon - I look like a stretched circle.
Answer: Oval - What do you call a triangle with all equal sides?
Answer: Equilateral triangle - I’m the longest side of a right triangle.
Answer: Hypotenuse - What shape has all sides different lengths?
Answer: Scalene triangle - What shape has only one pair of parallel sides?
Answer: Trapezoid - What angle is more than 90° but less than 180°?
Answer: Obtuse angle - What angle is exactly 90°?
Answer: Right angle - What angle is less than 90°?
Answer: Acute angle - What shape has 4 sides but no right angles?
Answer: Rhombus
Word Problem Riddles for 7th Graders
- A train leaves at 3 PM and arrives at 6 PM. How long was the trip?
Answer: 3 hours - You buy 3 pencils at $2 each. How much do you spend?
Answer: $6 - Sarah ate 1/3 of a pizza. How much is left?
Answer: 2/3 - If a book has 200 pages and you read 50 a day, how many days to finish?
Answer: 4 - You have 10 apples. You give away 4. How many are left?
Answer: 6 - A box holds 12 balls. You have 36 balls. How many boxes do you need?
Answer: 3 - You save $5 a day for 10 days. How much do you have?
Answer: $50 - You walk 2 miles to school and 2 miles back. How far is that?
Answer: 4 miles - You have 5 red marbles, 5 blue, and 5 green. How many total?
Answer: 15 - A pen costs $3. You have $9. How many pens can you buy?
Answer: 3 - If a movie starts at 4 and ends at 6:30, how long is it?
Answer: 2 hours 30 minutes - There are 24 students in class. Half are boys. How many boys?
Answer: 12 - If 3 boxes hold 18 candies, how many does 1 box hold?
Answer: 6 - If you double 25, then subtract 10, what do you get?
Answer: 40 - You have 100 stickers and give 30 away. What’s left?
Answer: 70
Fractions & Decimals Riddles for 7th Graders
- What is half of 1/2?
Answer: 1/4 - What is 0.5 as a fraction?
Answer: 1/2 - Which is bigger: 3/4 or 2/3?
Answer: 3/4 - What is 25% as a fraction?
Answer: 1/4 - What is 0.25 as a fraction?
Answer: 1/4 - What is 1/3 + 1/3?
Answer: 2/3 - What is 0.1 + 0.2?
Answer: 0.3 - What fraction of a dollar is 50 cents?
Answer: 1/2 - What is 1/2 of 12?
Answer: 6 - What is 75% as a fraction?
Answer: 3/4 - What is bigger: 0.9 or 0.89?
Answer: 0.9 - What is 0.6 as a fraction?
Answer: 3/5 - What is 10% of 50?
Answer: 5 - What is 2/5 of 20?
Answer: 8 - What is 0.04 written as a fraction?
Answer: 1/25
Probability & Statistics Riddles for 7th Graders
- What is the chance of flipping heads on a fair coin?
Answer: 1/2 - What is the chance of rolling a 3 on a standard die?
Answer: 1/6 - If you have 2 red balls and 8 blue balls, what is the probability of red?
Answer: 2/10 or 1/5 - If you roll a die, what’s the chance of rolling an even number?
Answer: 3/6 or 1/2 - If a spinner has 4 equal sections, what is the chance of one specific section?
Answer: 1/4 - What is the mode of 2, 2, 3, 4, 4, 4, 5?
Answer: 4 - What is the mean of 10, 20, 30, 40?
Answer: 25 - What is the median of 3, 7, 9, 11, 15?
Answer: 9 - What is the range of 4, 9, 15, 20?
Answer: 16 - If all outcomes are equally likely, what probability word describes that?
Answer: Fair - If you draw from a bag of 5 marbles and don’t put it back, what is that called?
Answer: Without replacement - What is the probability of picking a vowel from A, B, C, D, E?
Answer: 2/5 - If a class survey shows 12 like pizza and 8 like burgers, what is the total?
Answer: 20 - If 15 out of 30 students like math, what percent is that?
Answer: 50% - What is the least likely event: certain, likely, or impossible?
Answer: Impossible
Pattern & Sequence Riddles for 7th Graders
- What comes next? 3, 6, 9, 12, __
Answer: 15 - What comes next? 2, 4, 8, 16, __
Answer: 32 - What comes next? 5, 10, 20, 40, __
Answer: 80 - What comes next? 1, 1, 2, 3, 5, 8, __
Answer: 13 (Fibonacci) - What is the rule? 7, 14, 21, 28
Answer: Add 7 - What pattern doubles each time?
Answer: Geometric sequence - What comes next? 12, 11, 9, 6, __
Answer: 2 (subtracting 1, then 2, then 3, then 4) - What comes next? 10, 7, 4, 1, __
Answer: –2 (subtract 3 each time) - What comes next? 20, 15, 10, 5, __
Answer: 0 - What comes next? 4, 9, 14, 19, __
Answer: 24 (+5 each time) - What series is 1, 4, 9, 16, 25?
Answer: Square numbers - What is the next square after 49?
Answer: 64 - What is the next cube after 27?
Answer: 64 - What pattern uses multiplication instead of addition?
Answer: Geometric sequence - What comes next? 100, 90, 80, 70, __
Answer: 60
Challenging Math Riddles for 7th Graders
- What can you multiply by any number and always get the same result?
Answer: Zero - I add but never subtract. I grow but never shrink.
Answer: Age - What two numbers multiply to 20 but add to 9?
Answer: 4 and 5 - I am a number but also a month.
Answer: March (3) - A farmer has 17 sheep. All but 9 die. How many are left?
Answer: 9 - What increases but never decreases?
Answer: Time - What number do you get when you multiply all digits on a phone keypad?
Answer: 0 - What divides all numbers but can’t be divided?
Answer: 0 - What number has no value unless you put something in front of it?
Answer: 0 - What weighs more: a pound of feathers or a pound of bricks?
Answer: Same weight - If two is company and three is a crowd, what is four and five?
Answer: Nine - What comes once in a year, twice in a month, but never in a week?
Answer: The letter “E” - How many sides does a circle have?
Answer: Two (inside and outside) - What number becomes greater by adding a line to it?
Answer: 5 (add a line to make 6) - What number is most popular at school?
Answer: 1 (everyone wants to be number one)
Conclusion
These math riddles for 7th graders help sharpen critical thinking, build confidence, and keep learning interactive.
If used in class warm-ups, homework challenges, or fun family activities, riddles give students a fresh way to explore numbers, patterns, and logic.
With topics ranging from algebra to geometry, each riddle encourages curiosity and helps kids build problem-solving skills in the most enjoyable way possible.
The author behind RiddleBurst.com loves creating fun, clever, and unique riddles for all ages. Their goal is to challenge minds, bring smiles, and make learning through riddles both engaging and enjoyable.
