Counting

[RobbieM]

727 are the last three digits of St Albans' STD code.

Curiously enough, several years ago, some friends of mine moved to St Albans, and gave me their new phone number. It was 01727 abcdef. Back in the 1970s, when I was in Bristol, the old STD code (prior to the ones being used) was 0272, and our telephone number was also (abcdef). There was a nice symmetry about these two events connecting us: 272-abcdef and 727-abcdef.

[GuyBarry]

728 can be written as the difference of two cubes in two ways: 9^3 - 1^3 or 12^3 - 10^3. It is also the sum of two cubes: 6^3 + 8^3. This makes it the smallest number that can be written as the sum or difference of cubes in three different ways (the third cabtaxi number).

[DrainBrain]

3 x 3 x 3 x 3 x 3 x 3 = 729

[RobbieM]

729 - very intersting. Not only is it 9 to the power of 3, but also 3 to the power of 6.

[GuyBarry]

[I think that's the first time two people have posted the same fact!]

730 is an American slang term for "crazy". It comes from the motion a criminal defendant would have to file in order to be examined by a psychiatrist to determine whether he or she is fit to proceed to trial.

[RobbieM]

It was in 731 AD that Bede completed his Historia ecclesiastica gentis Anglorum.

[GuyBarry]

ISO 732 is an international standard for medium format photographic film.

[RobbieM]

I recently visited Peterborough. Last three digits of STD code are... 733.

[GuyBarry]

VPN error 734 occurs when the Point-to-Point Protocol (PPP) link is terminated and a dial-up connection cannot be established.

[DrainBrain]

A report on alcohol consumption estimated that heavy drinking costs Alaska $735 million annually, or about $1,100 annually per Alaskan resident.

[GuyBarry]

Not much else to do there during those cold winters...

736 = 7 + 3^6, making it a Friedman number - it can be written non-trivially using only its own digits and the usual arithmetic operators. (Because the digits are in the same order, it's known as a "nice" or "strong" Friedman number.)

[The Raven]

The Boeing 737 was first flown in 1967 and is still used by Ryanair

[greatkingrat]

The average monthly rent in July was £738

http://www.whatmortgage.co.uk/news/aver ... reach-738/

[GuyBarry]

In March this year, 739 miles of US coastline were protected for threatened loggerhead sea turtles.

[DrainBrain]

A 1930 Packard Custom Eight Model 740 Phaeton sold for $170,500 at auction in 2011.