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Welcome to the Math Puzzle Wiki
This is a collection of my favorite puzzles and brain teasers which contain some mathematical content. Most every puzzle here is taken from somewhere else, usually without express permission. When I can, I'll credit the source of the puzzle, but most come from "folklore" and have been retold many times by many people.
Types of puzzles
- Category:Algebra
- Category:Algorithms
- Category:Arithmetic
- Category:Calculus
- Category:Cases
- Category:Combinatorics
- Category:Comparison puzzles
- Category:Computer science
- Category:Crossing puzzles
- Category:Cryptarithmetic puzzles
- Category:Difficulty
- Category:Discrete math
- Category:Easy puzzles
- Category:Game theory
- Category:Games
- Category:Geometry
- Category:Graph theory
- Category:Induction
- Category:Lateral thinking
- Category:Liar puzzles
- Category:Logic
- Category:Logic puzzles
- Category:Magic tricks
- Category:Math topics
- Category:Measuring puzzles
- Category:Needs answer
- Category:Needs hint
- Category:Needs math
- Category:Needs solution
- Category:Needs work
- Category:Number theory
- Category:Optimization puzzles
- Category:Organization
- Category:Pattern recognition
- Category:Pigeonhole principle
- Category:Place value
- Category:Positional
- Category:Probability
- Category:Puzzle types
- Category:Sequences
- Category:Set theory
- Category:Short puzzles
- Category:Site maintenance
- Category:Solving techniques
- Category:Surprising answers
- Category:Tricky puzzles
- Category:Velocity puzzles
- Category:Weighing puzzles
See All categories
Full list of puzzles
- 7 orbs
- Angels and demons
- Ants on a cube
- Ants on a log
- Around the world
- Bags of gems
- Ball drop
- Blank dice
- Blind unshuffle
- Blood Sugar Level Support: A Step-by-Step Guide
- Cannibals and missionaries
- Celcius vs. Fahrenheit
- Cents per cents
- Checker board and dominoes
- Checkerboard and dominoes
- Checkerboard cut-up
- Chests of logic
- Chests of logic 3
- Chests of logic 4
- Coin game
- Commuter
- Condominium
- Consecutive hot dogs
- Cryptarithmetic
- Detective Merlin
- Dice stack
- Die Hard III
- Divisible by nine digits
- Domino circuit
- Double Russian roulette
- Earings
- Egg timers
- Eight options with six sides
- Eight queens
- Eight weights
- Failed exams
- Fair biased coin
- Farmer and the boat
- Fat travelers
- Fifteen
- Fill in the blanks
- Five card draw
- Five digits and one
- Five hats
- Five pirates
- Five towns
- Fly around the world
- Flying trains
- Forty thieves
- Four travelers
- Friends at a party
- Friends or non-friends
- Frog staircase
- Fruit boxes
- Fuses
- GO ON BOB
- Gem thief
- Girl, boy and dog
- Green eyed dragons
- Harry Potter and the hall of 100 doors
- High school play
- Hotel change
- Houses and utilities
- Jogging a hill
- Knight vs. dragon
- Lean meat
- Let's make another deal
- Liars and Truthtellers
- Light bulb
- Longest road
- Lying monkey
- Lying to the young
- Magic coin
- Marble madness
- Measuring Water
- Milk and coffee
- Monk's walk
- Monty Hall problem
- Multiple locks
- Next letter
- Next number
- Next sequence
- Nine minute fuse
- Nine prisoners
- Nine weights
- One-way roads
- Palindromic odometer
- Patriotic chameleons
- Penguin lineups
- Pizza split
- Poison
- Poppy party pizza
- Prisoners in red hats
- Probably blackjack
- Probably not transitive
- Prom problem
- Quarter cover
- Rabbit row
- Red vs black
- Round trip winds
- Sequence next in sequence
- Seven elevators
- Seven orbs
- Sharing water
- Six towns
- Six weights
- Soda machine
- Splitting ten
- Streaky dice
- Sum of product and sum
- Sum ratio
- Ten bags of gold
- Ten digit number
- Ten thieves
- The thief and the murderer
- The weird meeting riddle
- Three chests
- Three couples
- Three digit magic
- Three guesses
- Three logicians
- Three princesses
- Three prisoners
- Three sons
- Times of day
- Tommy's snack
- Too many trolls
- True or false
- Turn off a calculator
- Twelve weights
- Two EGGs
- Two guards
- Wagon collision
- Who does which?
- Wrong address
- Wrong clocks