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MoneyLingo
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Net worth and the maths behind money

Why a rupee today beats a rupee next year, what a purchase really costs, and the one sum that says whether you are better off than you were last year.

3 lessons · about 22 minutes · written for reading age 13 · last checked 2026-08-12

  1. A rupee today, a rupee next year

    Why the same number is worth two different amounts depending on when it lands, and how one turns into the other with a single division done on paper.

    7 min

  2. What a purchase actually costs

    The tag price is the smaller of two numbers. The other one changes with your age, which is why one phone costs a nineteen-year-old more than an uncle.

    7 min

  3. Net worth is the report card

    Salary is a flow and net worth is a level. One subtraction, ten minutes and a pen, and you have the answer a rising salary can never give you alone.

    8 min

  4. Check yourself

    4 questions at the end. Every wrong answer explains itself.

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