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£10 × [(1/3 + 2) × (5/2 + 2) × (6/4 + 2) × (1/1 + 2) − 1 − [(1/3 + 1) + (5/2 + 1) + (6/4 + 1) + (1/1 + 1)]] = £999.16 In effect, the bet has been calculated as a Lucky 15 minus the singles. Note that the total returns value of £999.16 is a penny higher than the previously calculated value as this quicker method only involves rounding ...
In the 2nd century CE, Ptolemy used the value 377 ⁄ 120, the first known approximation accurate to three decimal places (accuracy 2·10 −5). [16] It is equal to 3 + 8 / 60 + 30 / 60 2 , {\displaystyle 3+8/60+30/60^{2},} which is accurate to two sexagesimal digits.
It was used in the world record calculations of 2.7 trillion digits of π in December 2009, [3] 10 trillion digits in October 2011, [4] [5] 22.4 trillion digits in November 2016, [6] 31.4 trillion digits in September 2018–January 2019, [7] 50 trillion digits on January 29, 2020, [8] 62.8 trillion digits on August 14, 2021, [9] 100 trillion ...
All integers with seven or fewer decimal digits, and any 2 n for a ... 10010010000111111011011 2 = 4049 0fdb 16 ≈ 3. ... 1/2 of a unit in the last place.
William Rutherford [2] Calculated 208 decimal places, but not all were correct 152 1844: Zacharias Dase and Strassnitzky [2] Calculated 205 decimal places, but not all were correct 200: 1847: Thomas Clausen [2] Calculated 250 decimal places, but not all were correct 248: 1853: Lehmann [2] 261: 1853: Rutherford [2] 440: 1853: William Shanks [22]
The next rational number (ordered by size of denominator) that is a better rational approximation of π is 52 163 / 16 604 , though it is still only correct to six decimal places. To be accurate to seven decimal places, one needs to go as far as 86 953 / 27 678 . For eight, 102 928 / 32 763 is needed. [2] The accuracy of ...
In computing, a roundoff error, [1] also called rounding error, [2] is the difference between the result produced by a given algorithm using exact arithmetic and the result produced by the same algorithm using finite-precision, rounded arithmetic. [3]
where C is the circumference of a circle, d is the diameter, and r is the radius.More generally, = where L and w are, respectively, the perimeter and the width of any curve of constant width.