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The oldest known multiplication tables were used by the Babylonians about 4000 years ago. [2] However, they used a base of 60. [2] The oldest known tables using a base of 10 are the Chinese decimal multiplication table on bamboo strips dating to about 305 BC, during China's Warring States period. [2] "Table of Pythagoras" on Napier's bones [3]
84 is a semiperfect number, [1] being thrice a perfect number, and the sum of the sixth pair of twin primes (+). [2] It is the number of four-digit perfect powers in decimal . [ 3 ]
84 0124 Latin Capital letter T: 0053 U+0055 U 85 0125 Latin Capital letter U: 0054 U+0056 V 86 0126 Latin Capital letter V: 0055 U+0057 W 87 0127 Latin Capital letter W: 0056 U+0058 X 88 0130 Latin Capital letter X: 0057 U+0059 Y 89 0131 Latin Capital letter Y: 0058 U+005A Z 90 0132 Latin Capital letter Z: 0059 ASCII Punctuation & Symbols: U+ ...
Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as atomic weight, density, and electronegativity. For more detailed information about the origins of element names, see List of chemical element name etymologies.
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The tables below list all of the divisors of the numbers 1 to 1000. A divisor of an integer n is an integer m, for which n/m is again an integer (which is necessarily also a divisor of n). For example, 3 is a divisor of 21, since 21/7 = 3 (and therefore 7 is also a divisor of 21). If m is a divisor of n, then so is −m. The tables below only ...
A 13-year-old rescue dog has saved her 84-year-old owner after leading deputies to the injured man in his own home, police said. The incident occurred on Sept. 25 when Deputy Wright of the Stevens ...
Holiday names are usually pretty straightforward. New Year's, Thanksgiving and — perhaps least creatively, the 4th of July — all have origins that are fairly easy to figure out.