290

[Geology]  Rainbow Bridge, southern Utah, is the largest natural sandstone bridge in the world, 290 feet high and 275 feet across. It was designated a national monument in 1910 by President Taft.

[Phone]  International telephone dialing code for Saint Helena.

291

[Phone]  International telephone dialing code for Eritrea.

292

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

293

[Math.]  A right-truncatable prime number: self, 29 and 2 are prime numbers.

294

[Math.]  144,648 = 861×168 = 492×294.

295

296

[Math.]

296×333,667 = 98,765,432

2,996×33,336,667 = 99,876,654,332

29,996×3,333,366,667 = 99,987,666,543,332

299,996×333,333,666,667 = 99,998,766,665,433,332

...

[Measure]  A popular volume (milliliters or 10 fluid ounces) of a medium-size soft drink bottle.

[World]  The ISO country code for Kiribati (was Gilbert Islands). (ISO-3166)

297

[Geology] The length  of the world’s longest stretch of straight railroad track (297 miles), of the 2,461-mile long Indian Pacific railroad, connecting east and west coasts of Australia (Sydney to Perth).

[Library]  ISBN-0-297 is the International Standard Book Number for books published by Weidenfeld & Nicolson.

[Math.] 2972 = 88,209 = (88+209)2.

2973 = 26,198,073 = (26+198+073)3.

[Math.]  88+209 = 297 and 88,209 = 2972 and 494+209 = 703 and 494,209 = 7032 and 297+703 = 1000.

[Math.] 18×297 = 5,346 = 27×198. Each equality uses each of 9 digits 1-9 once.

[Phone]  International telephone dialing code for Aruba.

[Trivia] The sides of an A4 sheet of paper is 297 mm×210 mm, whose area is (1/16) m2 (or 62,370 mm2), the most popular size in the “A” series for international standard office documents. The size “An” in the “A” series is 21/4–n/2 21/4–n/2 m. The side-to-side ratio of any paper is always approximately (1:21/2). A size in this “A” series can be made by folding the previous size in half, A0: 1,189×841 – A1: 841×594 – A2: 594×420– A3: 420×297– A4: 297×210– A5: 210×148– A6: 148×105– A7: 105×74– A8: 74×52– A9: 52×37and A10: 37×26.

298

[Math.]  298 = (22+92+82)+(22+92+82).

[Phone]  International telephone dialing code for Faroe Islands.

299

[Phone]  International telephone dialing code for Greenland.

299.79

[EECS]  1 statvolt = 299.792458 volts.

290-299

[Library]  Numbers 200-299 are the first 3 digits in Dewey Decimal Classification System call numbers for library books in Religion and Theology. Numbers 290-299 are for books in in Comparative Religions, Islam and Judaism…

200-299

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