Description Chapter 1. The Great Cultural Heritage of Humanity: Numbers Long ago, people couldn't count numbers - Number sense…12 They used pebbles to represent numbers - One-to-one correspondence…14 They simplified how to express large numbers - Sumerian numerals…18 Counting was born from using fingers - Base 10 (Decimal system)…20 It's convenient to count in groups of five - Base 5 (Quinary system)…22 The Babylonians used a base-60 system - Base 60 (Sexagesimal system)…24 They were created based on the shapes of objects - Egyptian hieroglyphic numerals…26 Was it really devil's magic? - Hindu-Arabic numerals…28 The birth of the greatest number ever - The number 0…32 1000 in Korean is "jeumeun" - Korean words for numbers…34 Chapter 2. This Is How Calculation Developed Born from dividing objects - Fractions…38 Complex equations were expressed with symbols - The birth of mathematical symbols…40 The four arithmetic operations were shown with symbols - The birth of +, -, ×, ÷…42 A printer decided on it - The unknown "x"…44 The incredibly multiplying number of wheat grains - Exponents (Powers)…46 It was created to easily calculate interest - Decimals…48 Adding 1 to 100 in the blink of an eye - Gauss's addition method…50 Son, study this in secret - The multiplication table (Gugudan)…52 People of Goryeo also calculated fractions - Fractions in The Nine Chapters on the Mathematical Art…54 How many bundles of rice should be given? - Equations in The Nine Chapters on the Mathematical Art…56 The convenient calculator our ancestors used - Counting rods (Sangaji)…58 The first mechanical calculator was born - Pascaline…60 Chapter 3. The Amazing World of Shapes It arose from newly dividing land - Geometry…64 They measured the distance between land and ships using triangles - Congruence of triangles…66 They measured the height of the pyramids with a single stick - Triangles and the properties of proportion…70 They proved the properties of right triangles - The Pythagorean theorem…74 The East also had its own Pythagorean theorem - The Gougu theorem (Gou-Gu-Xian theorem)…78 The secret hidden in the star within a regular pentagon - The golden ratio…80 The greatest math book in history - Euclid's Elements…84 Don't ruin my circles - Archimedes and the circle…86 Archimedes calculates pi for the first time - Pi I…88 Mathematicians who calculated pi - Pi II…90 Measuring the Earth's circumference using circles and proportion - Circles and proportion…92 Proving the sum of a triangle's interior angles with colored paper - The sum of a triangle's interior angles…94 How to claim the largest piece of land? - The secret of circles…96 Why do bees build hexagonal honeycombs? - The secret of the regular hexagon…98 Build an altar to Apollo with double the volume - The volume of a cube…100 Chapter 4. Exciting Stories of Measurement, Probability, and Statistics The human body is the oldest measuring tape - The body and units of measurement…104 Qin Shi Huang unified weights and measures along with China - China's system of weights and measures…106 The secret inspector's essential tool, the yucheok - The yucheok (standard measuring rod)…108 We must unify the world's units into one - The metric system…110 Eureka! Eureka! - The volume of objects…112 Do you produce as much waste as you eat? - Measuring body weight…114 It began with gambling - Probability…116 Why do "geol" and "gae" come up so often in yutnori? - Number of cases and probability…118 It arose to solve social problems - Statistics…122 Chapter 5. Fun Math Stories How to escape a labyrinth - Mazes and math…126 Crossing the bridges of Königsberg - Drawing without lifting the pen (Eulerian path)…130 They predicted the date of a solar eclipse - Astronomy and math…132 They created a musical scale by listening to hammer sounds - Music and math…134 The race between Achilles and the tortoise - Zeno's paradox…136 "I am already married to the truth" - The first female mathematician…138 How many rabbits will there be after a year? - The Fibonacci sequence…140 "Those who fail the math exam will be punished" - King Sejong and mathematics…144 Would you like to try solving this problem? - A mathematical duel…146 How many soldiers were left? - Common multiples and the least common multiple…150 How many fish are there? - The properties of proportion…154 Welcome to Hilbert's Hotel - Infinity…156 Coordinates were born from watching a fly - Coordinates…158 Newton's great discovery - Calculus I…160 The fight between two great mathematicians - Calculus II…162 If this tower is completely moved, the world will end - The Tower of Hanoi…164 Magic