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The basic rule for divisibility by 4 is that if the number formed by the last two digits in a number is divisible by 4, the original number is divisible by 4; [2] [3] this is because 100 is divisible by 4 and so adding hundreds, thousands, etc. is simply adding another number that is divisible by 4. If any number ends in a two digit number that ...
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Spanish by Choice/SpanishPod newbie lesson A0131/Print version - Wikibooks, collection of open-content textbooks; Date and time of digitizing: 14:39, 4 May 2009: Software used: Firefox: File change date and time: 14:39, 4 May 2009: Conversion program: Acrobat Distiller 8.1.0 (Windows) Encrypted: no: Page size: 612 x 792 pts (letter) Version of ...
a primitive abundant number is an abundant number whose proper divisors are all deficient numbers or they are "abundant" numbers with no abundant proper divisors; a weird number is an abundant number that is not semiperfect; that is, no subset of the proper divisors of n sum to n
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Aside from being the smallest square triangular number other than 1, it is also the only triangular number (other than 1) whose square root is also a triangular number. 36 is also the eighth refactorable number, as it has exactly nine positive divisors, and 9 is one of them; [3] in fact, it is the smallest positive integer with at least nine ...
In a vigesimal place system, twenty individual numerals (or digit symbols) are used, ten more than in the decimal system. One modern method of finding the extra needed symbols is to write ten as the letter A, or A 20, where the 20 means base 20, to write nineteen as J 20, and the numbers between with the corresponding letters of the alphabet.
360 is divisible by the number of its divisors , and it is the smallest number divisible by every natural number from 1 to 10, except 7. Furthermore, one of the divisors of 360 is 72, which is the number of primes below it. 360 is the sum of twin primes (179 + 181) and the sum of four consecutive powers of three (9 + 27 + 81 + 243).