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90 is the only number to have an aliquot sum of 144 = 12 2. Only three numbers have a set of divisors that generate a sum equal to 90, they are 40, 58, and 89. [3] 90 is also the twentieth abundant [4] and highly abundant [5] number (with 20 the first primitive abundant number and 70 the second). [6] The number of divisors of 90 is 12. [7]
99.3 is "ninety-nine point three"; or "ninety-nine and three tenths" (U.S., occasionally). In English the decimal point was originally printed in the center of the line (0·002), but with the advent of the typewriter it was placed at the bottom of the line, so that a single key could be used as a full stop/period and as a decimal point.
The nicknames are sometimes known by the rhyming phrase 'bingo lingo' and there are rhymes for each number from 1 to 90, some of which date back many decades. In some clubs, the 'bingo caller' will say the number, with the assembled players intoning the rhyme in a call and response manner, in others, the caller will say the rhyme and the ...
D'yan Forest is a working comedian at 90, doing gigs in two languages. She shared some of her tips for staying fit and funny into her 90s. These include having a positive outlook and spending time ...
In this table, The first cell in each row gives a symbol; The second is a link to the article that details that symbol, using its Unicode standard name or common alias.
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99 is: . a composite number; a square-prime, of the form (p 2, q).It is the 11th composite number of this form and the third of the form (3 2, q).It has an aliquot sum of 57, within an aliquot sequence of two composite numbers (99,57,23,1,0), to the Prime in the 23-aliquot tree.
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