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Recreational Maths
by Terry Tam
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Recreational Maths

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Magic Tricks

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Handcuff Puzzles

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Linking Paperclips

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Human Knots

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Large Hole in a Small Piece of Paper

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Mobius Strips

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3-Switches Puzzle

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Speed Arithmetics

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Algebraic Identities

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24 Game

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Visual Aids

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Coconut and Monkey Puzzle

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Number Patterns

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Polygonal Numbers

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Pascal's Triangle

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Fibonacci Number

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Magic Squares

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2n-1

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4n

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4n+2

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7 Elevators Stop at 6 Floors

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Weighing a Counterfeit Coin

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1 Fake Coin in 9 Coins, Lighter/Heavier Known

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1 Fake Coin in 9 Coins, Lighter/Heavier Unknown

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1 Whole Pile of 10 Piles of Coins Lighter/Heavier

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Unknown Bottle(s) of 10 Bottles of Pills Lighter/Heavier

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River Crossing Puzzles

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Bridge and Torch Problem

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Missionaries and Cannibals Problem

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4 Jealous Husband Problem with Island

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Fox, Goose and Bag of Beans Problem

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Father, Mother, 2 Sons, 2 Daughters, Policeman and Thief Problem

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Optimization

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Stable Marriage Problem

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Secretary Problem

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Geometrical Optimization

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Mathematical Background

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Graph Theory

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Modular Arithmetic

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Divisibility Rule

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Number Systems

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Geometry

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Geometrical Transformation

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Topology

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Rigid Braced Framework

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Chessboard-related

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Tiling Dominoes

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15-Puzzle

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Knight Tour

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8-Queen Puzzle

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Cube-related

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Langford Problem

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Instant Insanity

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3 Utilities Puzzle

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Paradoxes

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Missing Dollar Riddle

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Missing Square Puzzle

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Inheriting 17 Horses Paradox

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Origami

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Flexagon

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Cootie Catcher

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Polyhedra

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9 Dots Puzzle

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Josephus Problem

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Alternative Proofs

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Dissection Proof

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Combinatorial Proof

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Kirkman's Schoolgirl Problem

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Social Golfer Problem

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