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Is15
Fifteen is a triangular number, a hexagonal number, a pentatope number and the 4th Bell number. Fifteen is the double factorial of 5. It is a composite number; its proper divisors being 1, 3 and 5. With only two exceptions, all prime quadruplets enclose a multiple of 15, with 15 itself being enclosed by the quadruplet (11, 13, 17, 19). 15 is also the number of supersingular primes...Fifteen is the magic constant of the unique order3 normal magic square...
You Dig Your Coal...
Then its sold back to you...
15 is one of The Numbers – 4, 8, 15, 16, 23, and 42 – featured in Lost...A restaurant in London, built by celebrity chef J Oliver...In the Hebrew numbering system, the number 15 is not written according to the usual method, with the letters that represent "10" and "5" (יה, yodh and heh), because those spell out one of the Jewish names of God. Instead, the date is written with the letters representing "9" and "6" (טו, teth and vav)......
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Last edited by lightgiver; 14072012 at 12:09 AM.
