30 wikipedia - EAS
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30 is an even, composite, pronic number. With 2, 3 and 5 as its prime factors, it is a regular number, and the first sphenic number; the smallest of the form 2 × 3 × r, where r is a prime greater than 3. It has an aliquot sum of 42, which is the second sphenic number. It is also: A semiperfect number, since
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See more• The minimum age for United States senators.
• In some regions of the continental United States, the 30th birthday is celebrated by gifting sticks....
See more• At about age 30 (according to Luke 3:23), Jesus of Nazareth was baptized by John the Baptist, signaling the beginning of his public ministry of teaching and healing. It was also the age when
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See more• The number of variations in Bach's Goldberg Variations
• 30, a 2001 album by Harry Connick, Jr.
• Thirty Seconds to Mars, an American rock band
• "30 Minutes", a song by t.A.T.u...
See more• The atomic number of zinc is 30.
Astronomy
• Messier object M30, a magnitude 8.5 globular cluster in...
See moreThirty is:
• Used (as –30–) to indicate the end of a newspaper (or broadcast) story, a copy editor's typographical notation
• The number of days in the...
See more• In tennis, the number 30 represents the second point gained in a game.
• In baseball, 30 is the number of teams in Major League Baseball....
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