100+ Best Math Riddles with Answers Fun, Tricky & Mind-Blowing
Super Easy & Classic Math Riddles
Riddle: If two’s company and three’s a crowd, what are four and five?
Answer: 9 (4 + 5)
Riddle: When I was 6, my sister was half my age. Now I’m 70. How old is my sister?
Answer: 67
Riddle: How many times can you subtract 10 from 100?
Answer: Once (because next time you subtract from 90)
Riddle: There are 4 apples and you take away 3. How many do you have?
Answer: 3
Riddle: What month has 28 days?
Answer: All of them
Riddle: What goes up but never comes down?
Answer: Your age
Riddle: What has hands but can’t clap?
Answer: A clock
Riddle: What has a head and tail but no body?
Answer: A coin
50 Hard Riddles with Answers That Will Challenge Even Adults
Riddle: What has one eye but can’t see?
Answer: A needle
Riddle: What has teeth but can’t bite?
Answer: A comb
Riddle: What has a neck but no head?
Answer: A shirt
Riddle: What gets wet while drying?
Answer: A towel
Riddle: What can travel the world while staying in a corner?
Answer: A stamp
Riddle: What has keys but can’t open locks?
Answer: A piano
Riddle: What gets bigger the more you take away?
Answer: A hole
Riddle: What has roots nobody sees, taller than trees?
Answer: A mountain
Riddle: What has a bottom at the top?
Answer: A leg
Riddle: What building has the most stories?
Answer: A library
Riddle: What has ears but can’t hear?
Answer: Corn
Riddle: What has a ring but no finger?
Answer: A telephone
Tricky & Famous Math Riddles
Riddle: How can you add eight 8’s to get 1000?
Answer: 888 + 88 + 8 + 8 + 8 = 1000
Riddle: I am an odd number. Take away one letter and I become even. What am I?
Answer: Seven
Riddle: If 5 cats catch 5 mice in 5 minutes, how long for 1 cat to catch 1 mouse?
Answer: 5 minutes
Riddle: Grandfather, two fathers, two sons go fishing — only 3 people. How?
Answer: Grandfather, father, son
Riddle: Divide 30 by half and add 10. What do you get?
Answer: 70
Riddle: What three numbers give same result added or multiplied?
Answer: 1, 2, 3
Riddle: If 1 = 5, 2 = 25, 3 = 125, 4 = 625, then 5 = ?
Answer: 1
Riddle: How many seconds in a year?
Answer: 12 (2nd of each month)
Riddle: Plane crashes on US-Canada border. Where bury survivors?
Answer: You don’t bury survivors
Riddle: What is always in front of you but can’t be seen?
Answer: The future
Riddle: If you say my name, I disappear. What am I?
Answer: Silence
Riddle: What has 13 hearts but no organs?
Answer: Deck of cards
Riddle: What word is spelled wrong in every dictionary?
Answer: Wrong
100 Riddles for Adults with Answers
Riddle: What has branches but no fruit or leaves?
Answer: A bank
Riddle: What can you hold in right hand but not left?
Answer: Your left hand
Riddle: What has 4 legs morning, 2 noon, 3 evening?
Answer: A human
Riddle: What has a heart that doesn’t beat?
Answer: An artichoke
Riddle: What can fill a room but takes no space?
Answer: Light
Riddle: What has 6 faces but no makeup?
Answer: A die
Riddle: Only even prime number?
Answer: 2
Mind-Blowing & Hard Math Riddles (41–70)
Riddle: Square root of 144?
Answer: 12
Riddle: 11 × 11 = ?
Answer: 121
Riddle: 12 × 12 = ?
Answer: 144
Riddle: Days in a leap year?
Answer: 366
Riddle: Zeros in a million?
Answer: 6
Riddle: Half of 10?
Answer: 5
Riddle: 50% of 100?
Answer: 50
Riddle: Number with letters in alphabetical order?
Answer: Forty
Riddle: Smallest prime number?
Answer: 2
Riddle: You have $100 to buy 100 animals. Cows $10, pigs $3, chickens $0.50. How many each?
Answer: 1 cow, 9 pigs, 90 chickens
Riddle: Three-digit number: tens digit 5 more than ones, hundreds 8 less than tens. What number?
Answer: 194
Riddle: Next in series: 1, 11, 21, 1211, 111221, 312211…?
Answer: 13112221
Riddle: Temperature same in Celsius and Fahrenheit?
Answer: -40
Riddle: Perimeter of a circle is called?
Answer: Circumference
Riddle: Faces on a cube?
Answer: 6
Riddle: Largest two-digit number?
Answer: 99
Riddle: Minutes in 12 hours?
Answer: 720
Riddle: Sum of angles in a triangle?
Answer: 180°
Riddle: 9 squared?
Answer: 81
Riddle: Millimeters in a meter?
Answer: 1000
Riddle: 1/3 of 99?
Answer: 33
Riddle: What has wheels and flies but not a plane?
Answer: Garbage truck
Riddle: What is black when clean, white when dirty?
Answer: Blackboard
Riddle: What has no beginning, end or middle?
Answer: Donut
Riddle: Roman numeral for 100?
Answer: C
Riddle: How many corners does a cube have?
Answer: 8
Riddle: What runs but never walks?
Answer: River
Riddle: What has a tongue but no mouth?
Answer: Shoe
Riddle: What is lighter than a feather but can’t be held long?
Answer: Breath
Riddle: What can you break without touching?
Answer: A promise
Quick & Super Tricky Math Riddles (71–100)
Riddle: What has a face and two hands but no body?
Answer: Clock
Riddle: How many letters in “the alphabet”?
Answer: 11
Riddle: How many equal sides in isosceles triangle?
Answer: 2
Riddle: What is 0 divided by 0?
Answer: Undefined
Riddle: What is the value of pi to 2 decimals?
Answer: 3.14
Riddle: How many centimeters in a meter?
Answer: 100
Riddle: What is 10 × 10?
Answer: 100
Riddle: What is factorial of 5 (5!)?
Answer: 120
Riddle: What is the square of 13?
Answer: 169
Riddle: How many grams in a kilogram?
Answer: 1000
Riddle: What is 15 × 15?
Answer: 225
Riddle: How many sides does a hexagon have?
Answer: 6
100 Halloween Riddles For Kids
Riddle: What is 25% of 200?
Answer: 50
Riddle: What is 8 cubed?
Answer: 512
Riddle: How many vertices does a cube have?
Answer: 8
Riddle: What is 100 divided by 4?
Answer: 25
Riddle: What is the next prime after 19?
Answer: 23
Riddle: How many edges does a cube have?
Answer: 12
Riddle: What is 7! (7 factorial)?
Answer: 5040
Riddle: What is the area of a circle with radius 1?
Answer: π (pi)
Riddle: What is 99 + 1?
Answer: 100
Riddle: What is the only prime number that is even?
Answer: 2
Riddle: How many faces, edges, and vertices does a cube have in total?
Answer: 6 faces, 12 edges, 8 vertices
Riddle: What is 1 + 1 in binary?
Answer: 10
Riddle: What is 100 in binary?
Answer: 64 + 32 + 4 = 1100100
Riddle: What is the square root of 1?
Answer: 1
Riddle: How many degrees in a full circle?
Answer: 360
Riddle: What is 10% of 1000?
Answer: 100
Riddle: What is the cube root of 27?
Answer: 3
Riddle: Final riddle – What is 1 + 99?
Answer: 100 (perfect ending!)
100 Riddles With Answers Funny Urdu
