300 (separate page)

 

301

[Calendar] The first year of the 4th century.

 

[Math.]  Six square numbers using the same digits: 1302 = 16900, 1402 = 19600, 3102 = 96100, 1032 = 10609, 2472 = 61009 and 3012 = 90601. 

 

[Math.]  Reversible numbers and their squares: 1032 = 10609 and 3012 = 90601.

 

[Sport] One of the popular beginning scores to play down to exactly zero in a dartboard game tournament: 501, 301, 601, 801 and 1001… which always end with 01. Higher scores are usually played by teams.

 

302

[Math.]  Three square numbers using the same digits: 1482 = 21904, 2032 = 41209 and 3022 = 91204.

 

[Phone] The only telephone area code for the state of Delaware, U.S.

 

303

[Calendar]  The number of non-leap years in a period of 400 years, following the adoption of the current Gregorian calendar, created by Pope Gregory XIII in 1582 to reform the old Julian calendar.

 

[Math.]  3033 = 27,818,127, is also a concatenation of cubes, 1, 8 and 27.

 

[Science]  The number 10303 is centillion, in American system. In British system, centillion is 10600.

 

[Tech.]  BMW (Bayerische Motoren Werke) cars’ numbered classics models: 303, 309, 315, 319, 320, 321, 326, 327, 329, 501, 502, 503, 507. (Not all entries completed).

 

304

[Calendar]  The first Roman calendar was introduced in the year 535 BC, having 10 months, with 304 days a year, beginning in March.

 

[Money]  A Diners Club/Carte Blanche credit card number starts with either 2 digits 36, 38 or 3 digits 300, 301, 302, 303, 304 or 305.

 

[Phone] The only telephone area code for the state of West Virginia, U.S.

 

[World] The ISO country code for Greenland. (ISO-3166)

 

[Measure] 304.8 mm (millimeters) = 1 ft (foot).

(U.S. customary and metric units for linear measures).

 

305

[Math.]  3053 = 28,372,625 = (283+7+2+6+2+5)3.

 

306

[Library]  ISBN-0-306 is the International Standard Book Number for books published by Plenum Press.

 

307

[Library]  ISBN-0-307 is the International Standard Book Number for books published by Vintage Contemporaries. Also ISBN-1-4000.

 

[Phone]  The only telephone area code for the state of Wyoming, U.S.

 

[Tech.]  Boeing S-307 Stratoliner is the first pressurized passenger aircraft.

 

308

[World] The ISO country code for Grenada. (ISO-3166)

 

309

[Library]  ISBN-0-309 is the International Standard Book Number for books published by National Academy Press/Joseph Henry Press.

 

300, 301, 302, 303, 304 & 305

[Money]  A Diners Club/Carte Blanche credit card number starts with either 2 digits 36, 38 or 3 digits 300, 301, 302, 303, 304 or 305.

 

300-309

[Library]  Numbers 300-399 are the first 3 digits in Dewey Decimal Classification System call numbers for library books in Social Sciences (Economics, Government and Education…). Numbers 300-307 are for general works.