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  2. List of types of numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_types_of_numbers

    Fractions: A representation of a non-integer as a ratio of two integers. These include improper fractions as well as mixed numbers . Continued fraction : An expression obtained through an iterative process of representing a number as the sum of its integer part and the reciprocal of another number, then writing this other number as the sum of ...

  3. National Council of Educational Research and Training

    en.wikipedia.org/wiki/National_Council_of...

    NCERT has a comprehensive extension program in which departments of the National Institute of Education, Regional Institute of Education, Central Institute of Vocational Education, and field coaches' offices in the states are engaged in activities. Several programs are organized in rural and backward areas to reach out to functionaries in these ...

  4. Integer - Wikipedia

    en.wikipedia.org/wiki/Integer

    The integers arranged on a number line. An integer is the number zero , a positive natural number (1, 2, 3, . . .), or the negation of a positive natural number (−1, −2, −3, . . .). [1] The negations or additive inverses of the positive natural numbers are referred to as negative integers. [2]

  5. Brahmagupta - Wikipedia

    en.wikipedia.org/wiki/Brahmagupta

    Here Brahmagupta found the result in terms of the sum of the first n integers, rather than in terms of n as is the modern practice. [24] He gives the sum of the squares of the first n natural numbers as ⁠ n(n + 1)(2n + 1) / 6 ⁠ and the sum of the cubes of the first n natural numbers as (⁠ n(n + 1) / 2 ⁠) 2.

  6. NCERT textbook controversies - Wikipedia

    en.wikipedia.org/wiki/NCERT_textbook_controversies

    Similarly from the Class X History textbook, chapters on 'The Nationalist Movement in Indo-China', 'Work, Life and Leisure - Cities in the Contemporary World', and ‘Novels, Society and History’ had been deleted. NCERT's director Hrushikesh Senapaty highlighted that students must have time to engage outdoor.

  7. Congruent number - Wikipedia

    en.wikipedia.org/wiki/Congruent_number

    Triangle with the area 6, a congruent number. In number theory , a congruent number is a positive integer that is the area of a right triangle with three rational number sides. [ 1 ] [ 2 ] A more general definition includes all positive rational numbers with this property.

  8. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]

  9. Euclid's lemma - Wikipedia

    en.wikipedia.org/wiki/Euclid's_lemma

    The two first subsections, are proofs of the generalized version of Euclid's lemma, namely that: if n divides ab and is coprime with a then it divides b. The original Euclid's lemma follows immediately, since, if n is prime then it divides a or does not divide a in which case it is coprime with a so per the generalized version it divides b.