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  2. Divisibility rule - Wikipedia

    en.wikipedia.org/wiki/Divisibility_rule

    Take each digit of the number (371) in reverse order (173), multiplying them successively by the digits 1, 3, 2, 6, 4, 5, repeating with this sequence of multipliers as long as necessary (1, 3, 2, 6, 4, 5, 1, 3, 2, 6, 4, 5, ...), and adding the products (1×1 + 7×3 + 3×2 = 1 + 21 + 6 = 28). The original number is divisible by 7 if and only if ...

  3. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    For instance, the numeral for 10,405 uses one time the symbol for 10,000, four times the symbol for 100, and five times the symbol for 1. A similar well-known framework is the Roman numeral system. It has the symbols I, V, X, L, C, D, M as its basic numerals to represent the numbers 1, 5, 10, 50, 100, 500, and 1000. [33]

  4. Multiplication table - Wikipedia

    en.wikipedia.org/wiki/Multiplication_table

    In mathematics, a multiplication table (sometimes, less formally, a times table) is a mathematical table used to define a multiplication operation for an algebraic system. The decimal multiplication table was traditionally taught as an essential part of elementary arithmetic around the world, as it lays the foundation for arithmetic operations ...

  5. 1,000,000,000 - Wikipedia

    en.wikipedia.org/wiki/1,000,000,000

    The metric prefix giga indicates 1,000,000,000 times the base ... such that the remainder when 6 k is divided by k ... n > 1 such that 2 n is congruent to 3 (mod n) [52]

  6. List of U.S. states and territories by GDP - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._states_and...

    The following list includes the annual nominal gross domestic product for each of the 50 U.S. states and the national capital of Washington, D.C. and the GDP change and GDP per capita as of 2024.

  7. List of countries by traffic-related death rate - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    However, fewer than 35 percent of low- and middle-income countries have policies in place to protect these road users. [3] The average rate was 17.4 per 100,000 people. Low-income countries now have the highest annual road traffic fatality rates, at 24.1 per 100,000, while the rate in high-income countries is lowest, at 9.2 per 100,000.

  8. Rule of 72 - Wikipedia

    en.wikipedia.org/wiki/Rule_of_72

    Thus at 3.5% inflation using the rule of 70, it should take approximately 70/3.5 = 20 years for the value of a unit of currency to halve. [1] To estimate the impact of additional fees on financial policies (e.g., mutual fund fees and expenses, loading and expense charges on variable universal life insurance investment portfolios), divide 72 by ...

  9. List of Japanese people by net worth - Wikipedia

    en.wikipedia.org/wiki/List_of_Japanese_people_by...

    US$3.7 billion: Mori Trust: 10 Masahiro Noda: 83 US$3.5 billion Obic: 11 Yasumitsu Shigeta: 57 US$3.2 billion Hikari Tsushin, Inc. 12: Masahiro Miki: 59: US$3.0 billion: ABC-Mart: 12 Masateru Uno: 75 US$3.0 billion Cosmos Pharmaceutical: 14: Takao Yasuda 72: US$2.7 billion: Don Quijote: 15 Yoichi & Keiko Erikawa: N/A US$2.5 billion Koei: 16 ...