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  2. Cube (algebra) - Wikipedia

    en.wikipedia.org/wiki/Cube_(algebra)

    y = x 3 for values of 1 ≤ x ≤ 25.. In arithmetic and algebra, the cube of a number n is its third power, that is, the result of multiplying three instances of n together. The cube of a number n is denoted n 3, using a superscript 3, [a] for example 2 3 = 8.

  3. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    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] A numeral system is positional if the position of a basic numeral in a compound expression determines its value. Positional numeral systems have a radix that acts as a multiplicand of the different positions. For each ...

  4. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    1.4.1 The "Ends of Five" Formula. ... Download as PDF; Printable version; In other projects ... divided by the known square root: ...

  5. Golden ratio - Wikipedia

    en.wikipedia.org/wiki/Golden_ratio

    The colored arcs divide each edge in the golden ratio; when two tiles share an edge, their arcs must match. The golden ratio appears prominently in the Penrose tiling , a family of aperiodic tilings of the plane developed by Roger Penrose , inspired by Johannes Kepler 's remark that pentagrams, decagons, and other shapes could fill gaps that ...

  6. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    The quadratic formula, which concisely expresses the solutions of all quadratic equations The Rubik's Cube group is a concrete application of group theory. [26] Algebra is the art of manipulating equations and formulas. Diophantus (3rd century) and al-Khwarizmi (9th century) were the two main precursors of algebra.

  7. Abramowitz and Stegun - Wikipedia

    en.wikipedia.org/wiki/Abramowitz_and_Stegun

    Michael Danos and Johann Rafelski edited the Pocketbook of Mathematical Functions, published by Verlag Harri Deutsch in 1984. [14] [15] The book is an abridged version of Abramowitz's and Stegun's Handbook, retaining most of the formulas (except for the first and the two last original chapters, which were dropped), but reducing the numerical tables to a minimum, [14] which, by this time, could ...

  8. Alcohol by volume - Wikipedia

    en.wikipedia.org/wiki/Alcohol_by_volume

    The number of millilitres of pure ethanol is the mass of the ethanol divided by its ... 39–45% 39.00 45.00 ... The formulas here assume that the former definition ...

  9. Divisibility rule - Wikipedia

    en.wikipedia.org/wiki/Divisibility_rule

    1050 → 0501 (reverse) → 0×1 + 5×3 + 0×2 + 1×6 = 0 + 15 + 0 + 6 = 21 (multiply and add). ANSWER: 1050 is divisible by 7. Vedic method of divisibility by osculation Divisibility by seven can be tested by multiplication by the Ekhādika. Convert the divisor seven to the nines family by multiplying by seven. 7×7=49.