Math Puzzles Volume 3: Even More Riddles And Brain Teasers In Geometry, Logic, Number Theory, And Probability

Part I: Easy Puzzles
Part II: Medium Puzzles
Part III: Hard Puzzles
Puzzle 1: Triangle Ratios
Answer To Puzzle 1: Triangle Ratios
Puzzle 2: Nine Dots
Answer To Puzzle 2: Nine Dots
Puzzle 3: Six Boxes
Answer To Puzzle 3: Six Boxes
Puzzle 4: Divide Into 4
Answer To Puzzle 4: Divide Into 4
Puzzle 5: Circles In Triangles
Answer To Puzzle 5: Circles In Triangles
Puzzle 6: Area Of Triangle
Answer To Puzzle 6: Area Of Triangle
Puzzle 7: Covering A Chessboard
Answer To Puzzle 7: Covering A Chessboard
Puzzle 8: A Matchstick Problem
Answer To Puzzle 8: A Matchstick Problem
Puzzle 9: Medicine
Answer To Puzzle 9: Medicine
Puzzle 10: Rope Burning
Answer To Puzzle 10: Rope Burning
Puzzle 11: Cheryl's Birthday
Answer To Puzzle 11: Cheryl's Birthday
Puzzle 12: Cheryl's Hat Color
Answer To Puzzle 12: Cheryl's Hat Color
Puzzle 13: Four Hats
Answer To Puzzle 13: Four Hats
Puzzle 14: Water Jug
Answer To Puzzle 14: Water Jug
Puzzle 15: Dehydrated Food
Answer To Puzzle 15: Dehydrated Food
Puzzle 16: Crossing Trains
Answer To Puzzle 16: Crossing Trains
Puzzle 17: Monks Crossing
Answer To Puzzle 17: Monks Crossing
Puzzle 18: Crossing Trucks
Answer To Puzzle 18: Crossing Trucks
Puzzle 19: Slicing Vegetables
Answer To Puzzle 19: Slicing Vegetables
Puzzle 20: Moving Walkway
Answer To Puzzle 20: Moving Walkway
Puzzle 21: Wind Speed
Answer To Puzzle 21: Wind Speed
Puzzle 22: Michelson-Morley
Answer To Puzzle 22: Michelson-Morley
Puzzle 23: Smartphone Battery
Answer To Puzzle 23: Smartphone Battery
Puzzle 24: Vietnam Problem
Answer To Puzzle 24: Vietnam Problem
Puzzle 1: Paths Home
Answer To Puzzle 1: Paths Home
Puzzle 2: Two Sequences
Answer To Puzzle 2: Two Sequences
Puzzle 3: 100 Lamps
Answer To Puzzle 3: 100 Lamps
Puzzle 4: Trailing Zeroes
Answer To Puzzle 4: Trailing Zeroes
Puzzle 5: Number Of Digits
Answer To Puzzle 5: Number Of Digits
Puzzle 6: Odd Even Sequence
Answer To Puzzle 6: Odd Even Sequence
Puzzle 7: Divisible By 3
Answer To Puzzle 7: Divisible By 3
Puzzle 8: Two Be Or Not Two Be
Answer To Puzzle 8: Two Be Or Not Two Be
Puzzle 9: Infinite Fraction
Answer To Puzzle 9: Infinite Fraction
Puzzle 10: Nested Radical
Answer To Puzzle 10: Nested Radical
Puzzle 11: Infinite Exponents
Answer To Puzzle 11: Infinite Exponents
Puzzle 12: Guess My Polynomial
Answer To Puzzle 12: Guess My Polynomial
Puzzle 13: Find The Missing Number
Answer To Puzzle 13: Find The Missing Number
Puzzle 14: Poisoned Beer
Answer To Puzzle 14: Poisoned Beer
Puzzle 15: 100 Passengers
Answer To Puzzle 15: 100 Passengers
Puzzle 16: 100 Floors
Answer To Puzzle 16: 100 Floors
Puzzle 17: 3 Locks
Answer To Puzzle 17: 3 Locks
Puzzle 18: Which Foul?
Answer To Puzzle 18: Which Foul?
Puzzle 19: Choosing With A Coin
Answer To Puzzle 19: Choosing With A Coin
Puzzle 20: Sex Ratio
Answer To Puzzle 20: Sex Ratio
Puzzle 21: Unfound Errors
Answer To Puzzle 21: Unfound Errors
Puzzle 22: Random Penalty Kicks
Answer To Puzzle 22: Random Penalty Kicks
Puzzle 23: Highest Number Almost Always Wins
Answer To Puzzle 23: Highest Number Almost Always Wins
Puzzle 24: Race To 15
Answer To Puzzle 24: Race To 15
Puzzle 1: Probability Of Forming A Triangle
Answer To Puzzle 1: Probability Of Forming A Triangle
Puzzle 2: Three Napkins
Answer To Puzzle 2: Three Napkins
Puzzle 3: Hidden Treasure
Answer To Puzzle 3: Hidden Treasure
Puzzle 4: Buffon's Needle
Answer To Puzzle 4: Buffon's Needle
Puzzle 5: 52 Cards From 52 Decks
Answer To Puzzle 5: 52 Cards From 52 Decks
Puzzle 6: Random Holidays
Answer To Puzzle 6: Random Holidays
Puzzle 7: Matching Cards
Answer To Puzzle 7: Matching Cards
Puzzle 8: Avoid A Red Card
Answer To Puzzle 8: Avoid A Red Card
Puzzle 9: Broken Coffee Machine
Answer To Puzzle 9: Broken Coffee Machine
Puzzle 10: Straw That Broke The Camel's Back
Answer To Puzzle 10: Straw That Broke The Camel's Back
Puzzle 11: Random Numbers Ratio
Answer To Puzzle 11: Random Numbers Ratio
Puzzle 12: πe or eπ?
Answer To Puzzle 12: πe or eπ?
Puzzle 13: Guess The 1,000th Number
Answer To Puzzle 13: Guess The 1,000th Number
Puzzle 14: How Many Primes?
Answer To Puzzle 14: How Many Primes?
Puzzle 15: Powers Of 2
Answer To Puzzle 15: Powers Of 2
Puzzle 16: Smaller Envelope
Answer To Puzzle 16: Smaller Envelope
Puzzle 17: Russian Roulette Option
Answer To Puzzle 17: Russian Roulette Option
Puzzle 18: Group Testing
Answer To Puzzle 18: Group Testing
Puzzle 19: Basketball Knockout
Answer To Puzzle 19: Basketball Knockout
Puzzle 20: Cards On A Square
Answer To Puzzle 20: Cards On A Square
Puzzle 21: Even Betting
Puzzle 21: Answer To Even Betting
Puzzle 22: Rolling A 100-Sided Die
Answer To Puzzle 22: Rolling A 100-Sided Die