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  2. Sieve of Eratosthenes - Wikipedia

    en.wikipedia.org/wiki/Sieve_of_Eratosthenes

    A prime number is a natural number that has exactly two distinct natural number divisors: the number 1 and itself. To find all the prime numbers less than or equal to a given integer n by Eratosthenes' method: Create a list of consecutive integers from 2 through n: (2, 3, 4, ..., n). Initially, let p equal 2, the smallest prime number.

  3. Symbolab - Wikipedia

    en.wikipedia.org/wiki/Symbolab

    Symbolab is an answer engine [1] that provides step-by-step solutions to mathematical problems in a range of subjects. [2] It was originally developed by Israeli start-up company EqsQuest Ltd., under whom it was released for public use in 2011. In 2020, the company was acquired by American educational technology website Course Hero. [3] [4]

  4. Coin problem - Wikipedia

    en.wikipedia.org/wiki/Coin_problem

    The expanded polynomial will contain powers of greater than the Frobenius number for some exponent (when GCD=1), e.g., for (+ +) the set is {6, 7} which has a Frobenius number of 29, so a term with will never appear for any value of but some value of will give terms having any power of greater than 29.

  5. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    Calculators generally perform operations with the same precedence from left to right, [1] but some programming languages and calculators adopt different conventions. For example, multiplication is granted a higher precedence than addition, and it has been this way since the introduction of modern algebraic notation.

  6. Factorization - Wikipedia

    en.wikipedia.org/wiki/Factorization

    The polynomial x 2 + cx + d, where a + b = c and ab = d, can be factorized into (x + a)(x + b).. In mathematics, factorization (or factorisation, see English spelling differences) or factoring consists of writing a number or another mathematical object as a product of several factors, usually smaller or simpler objects of the same kind.

  7. Triangular number - Wikipedia

    en.wikipedia.org/wiki/Triangular_number

    The number of line segments between closest pairs of dots in the triangle can be represented in terms of the number of dots or with a recurrence relation: = = (); = + (), = In the limit , the ratio between the two numbers, dots and line segments is lim n → ∞ T n L n = 1 3 . {\displaystyle \lim _{n\to \infty }{\frac {T_{n}}{L_{n}}}={\frac {1 ...

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  9. 7 - Wikipedia

    en.wikipedia.org/wiki/7

    7 (seven) is the natural number following 6 and preceding 8. It is the only prime number preceding a cube. As an early prime number in the series of positive integers, the number seven has greatly symbolic associations in religion, mythology, superstition and philosophy. The seven classical planets resulted in seven being the number of days in ...