274
Constantine, Roman Emperor from 306 to 337; was born in 274, at Naissus in Upper Moesia, a son of Constantius Chlorus and Helena.
£275, the amount crime costs each person every year according to the Telegraph.
276 area code for Virginia
277 secrets that a cat wants to know apparently! 
278
No explanation 
I can’t find anything interesting about 279
280
U.S. Route 280 currently runs for 392 miles (631 km) from Blichton, Georgia at U.S. Highway 80 to Birmingham, Alabama at I-20/I-59.
For much of its route, U.S 280 travels through rural areas and smaller cities in southern Georgia and east central Alabama.
Once the highway approaches Birmingham, it is a major suburban route.
Work was completed in 2006 making U.S 280 a four-lane highway throughout the entire state of Alabama.
This project began in the 1970’s. As a result, U.S. 280 now bypasses numerous small towns in east Alabama, including Goodwater, Jacksons’ Gap, Camp Hill and Waverly.
Bet you were dying to know this
282 mpg
Laugh at High Gas Prices With a 282-MPG VW
283 - The sum of 283 is 13, unlucky for some.
The average monthly wage in Bulgaria is 284 BGN
(at least it was in 2007)
285 is a proposed interstate designation for US 52 between I-85 near Lexington and I-40 in Winston-Salem.
287 years since britain got its first prime minister
April 4 1721 Robert Walpole.
The Bagger 288.
completed in1978 it’s the largest tracked vehicle in the world at 13,500 tons.
It is the heaviest land vehicle.
Trubrit:
278No explanation
278 forum members trying to change Madbaz’s light bulb. 
2f 89s
Better than 189…I’ll get me coat
Junkers Ju 290 bomber
2 9 1 most important numbers in rugby especially number 2 