Packs
Every Bertopia pack, with sample cards and the sources behind them.
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Algebra Workout Equations, factoring, functions and logs, solved step by step
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Ancient Civilizations What Egypt, Mesopotamia, the Indus, China, Greece, Rome and the Maya built, wrote and invented
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Arithmetic Workout Order of operations, fractions, percents and mental math, with worked steps
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Biology Essentials Why living things work the way they do
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Calculus Workout Limits, derivatives, integrals and series, worked out
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Capitals Capital cities of every country
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Chemistry Essentials Why atoms bond, react and behave the way they do
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Database Interview Practice Backend interview questions on schema design, SQL, indexing, transactions, scaling and migrations
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Coding Interview Practice Data structures and algorithms interview problems, worked through like a strong candidate
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Everyday Know-How Units, conversions and how ordinary things work
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Flags Every flag of the world
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Games Trivia Chess, board games, cards and video game history
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General Knowledge A broad mix across science, history, places and more
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हिंदी से English Learn English from Hindi
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Dates in History When it happened, from the ancient world to the 21st century
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People in History Rulers, thinkers and changemakers from every continent
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How Computers Work Binary, logic gates, CPUs, storage, the internet and secret codes
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Inventors and Discoveries Printing, vaccines, flight, light bulbs and the Moon landing
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Japanese Kana Read hiragana and katakana, lookalikes, dakuten and small kana included
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Kannada Basics Spoken Kannada from zero: first words, numbers, phrases and simple sentences
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Kannada Script Basics For after Kannada Basics: read the letters, then your first written words
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Living Things Sorting animals, how plants feed, food chains, clever adaptations and your body
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Human Body and Health How your body works and what keeps it healthy
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Money Basics Budgets, saving, interest, credit, payslips and scams
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Nature Records The tallest, deepest, fastest, biggest and oldest on Earth
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Networking Interview Practice Networking questions software engineering interviewers actually ask
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Operating Systems Interview Practice Concurrency, memory, scheduling and I/O questions for software engineering interviews
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Physics Essentials Why things move, heat up, shine and spark
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Pop Culture Classics Films, music and books that have stood the test of time
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Language Gotchas Python, Java, JavaScript, TypeScript, Go and Kotlin semantics as they come up in coding interviews
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Python Basics Read short Python snippets and predict what they print
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Shapes and Measures Angles, area, volume, units, negative numbers and ratio
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Space and Planets Planets, the Moon, seasons, stars and famous missions
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Spanish Grammar Ser and estar, por and para, past tenses and the subjunctive, one tap at a time
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Spanish Phrases The Spanish you actually say: greetings, travel, food and small talk
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Spanish Vocabulary Everyday Spanish words for English speakers, false friends included
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Statistics Workout Probability, distributions, inference and regression, with worked answers
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System Design Interview Practice Real interview questions with strong answers, tradeoffs and code
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World History Empires, trade and turning points across every continent
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World Places Oceans, rivers, mountains, borders and where famous places are
