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  2. Rounding - Wikipedia

    en.wikipedia.org/wiki/Rounding

    Rounding can also be important to avoid misleadingly precise reporting of a computed number, measurement, or estimate; for example, a quantity that was computed as 123456 but is known to be accurate only to within a few hundred units is usually better stated as "about 123500".

  3. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    The significance of trailing zeros in a number not containing a decimal point can be ambiguous. For example, it may not always be clear if the number 1300 is precise to the nearest unit (just happens coincidentally to be an exact multiple of a hundred) or if it is only shown to the nearest hundreds due to rounding or uncertainty.

  4. Approximations of π - Wikipedia

    en.wikipedia.org/wiki/Approximations_of_π

    Pi Hex was a project to compute three specific binary digits of π using a distributed network of several hundred computers. In 2000, after two years, the project finished computing the five trillionth (5*10 12), the forty trillionth, and the quadrillionth (10 15) bits. All three of them turned out to be 0.

  5. Percentile - Wikipedia

    en.wikipedia.org/wiki/Percentile

    Using the nearest-rank method on lists with fewer than 100 distinct values can result in the same value being used for more than one percentile. A percentile calculated using the nearest-rank method will always be a member of the original ordered list. The 100th percentile is defined to be the largest value in the ordered list.

  6. Distance from a point to a line - Wikipedia

    en.wikipedia.org/wiki/Distance_from_a_point_to_a...

    The distance (or perpendicular distance) from a point to a line is the shortest distance from a fixed point to any point on a fixed infinite line in Euclidean geometry.It is the length of the line segment which joins the point to the line and is perpendicular to the line.

  7. Chronology of computation of π - Wikipedia

    en.wikipedia.org/wiki/Chronology_of_computation...

    Made use of a desk calculator [24] 620: 1947 Ivan Niven: Gave a very elementary proof that π is irrational: January 1947 D. F. Ferguson: Made use of a desk calculator [24] 710: September 1947 D. F. Ferguson: Made use of a desk calculator [24] 808: 1949 Levi B. Smith and John Wrench: Made use of a desk calculator 1,120

  8. Hundredth - Wikipedia

    en.wikipedia.org/wiki/Hundredth

    A hundredth is also one percent. A hundredth is the reciprocal of 100. A hundredth is written as a decimal fraction as 0.01, and as a vulgar fraction as 1/100. [2] “Hundredth” is also the ordinal number that follows “ninety-ninth” and precedes “hundred and first.” It is written as 100th.

  9. Square root of 7 - Wikipedia

    en.wikipedia.org/wiki/Square_root_of_7

    An extraction by Newton's method (approximately) was illustrated in 1922, concluding that it is 2.646 "to the nearest thousandth". [ 9 ] For a family of good rational approximations, the square root of 7 can be expressed as the continued fraction