280

[Sport]  The popular scores for an even par of a typical golf tournament of four 18-hole rounds are: 280, 284 or 288.

 

281

[Math.]  A prime number.

 

[Math.]  The only prime number that is the sum of 14 consecutive prime numbers: 281= 2+3+5+7+11+13+17+19+23+29+31+37+41+43.

 

[Math.]  Four square numbers using the same digits: 1332 = 17689, 1372 = 18769, 2812 = 78961 and 2862 = 81796.

 

282

[Math.] The denominator of the 46th Bernoulli number.

 

[Measure] A beer gallon = 4.621 liters = 1.2208 (U.S. liquid) gallons = 1.0165 (British imperial) gallons = 282 inch3.

 

283

[Math.]  A prime number.

 

[Math.]  283 = 25+8+35.

 

284

[Math.]  The smallest and only pair of amicable numbers less than 1000 is (220, 284). (From the formula F.7 for n = 1). The first known.

 

[Phone]  The telephone area code for British Virgin Islands (within U.S./NANPA).

 

[Sport]  The popular scores for an even par of a typical golf tournament of four 18-hole rounds are: 280, 284 or 288.

 

285

[Math.]  A pyramidal number (sum of all squares of integers from 1 to 9): 285 = 12+22+32+42+52+62+72+82+92.

 

[Math.]  Three square numbers using the same digits: 1352 = 18225, 1592 = 25281 and 2852 = 81225.

 

286

[Math.]  Four square numbers using the same digits: 1332 = 17689, 1372 = 18769, 2812 = 78961 and 2862 = 81796.

 

[Sport]  The number of dimples on a golf ball usually are: 252, 286, 332, 336, 360, 384, 392, 410, 416, 420, 422, 432, 440, 480, 492 or 500. (References [6])

 

[Tech.]  Intel’s popular 286 (or 80286) CPU in the family of x86.

 

287

[Math.] 

2872 = 82,369 = (–082+369)2

2873 = 23,639,903 = (023–639+903)3

2874 = 6,784,652,161 = (–006+784–652+161)4

2875 = 1,947,195,170,207 = (–1+9+47+195–170+207)5.

 

288

[Math.]  288 = 14×23×32×41.

 

[Math.]  288 = 11+22+33+44.

 

[Math.]  Three square numbers using the same digits: 2072 = 42849, 2222 = 49284 and 2882 = 82944.

 

[Measure]  1 pound apothecaries = 12 ounces apothecaries = 96 drams apothecaries = 288 scruples = 5760 grains.

 

[Sport]  The popular scores for an even par of a typical golf tournament of four 18-hole rounds are: 280, 284 or 288.

 

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

 

289

[Math.]  A square number: 289 = 172.

  

 

280-289

[Library]  Numbers 200-299 are the first 3 digits in Dewey Decimal Classification System call numbers for library books in Religion and Theology. Numbers 280-289 are for books in Christian Denominations and Sects.

 

 200-299

[Education]  The numbers commonly assigned for graduate courses in most U.S. universities and colleges.

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References [6]: Scientific American, I. Stewart, Mathematical Recreations, February 1997.