It might be different in various countries.. Here's part of the history for the USA: http://www.privateline.com/mt_telecomhistory/b_letter_prefixes_or_exchange_names/
Five digit- four digit
There are 120 of them. Here are five: 1,357 3,579 5,791 7,913 9,135
Four to the first power is four. Any number to the first power is that number.
four
The sum of the first four prime numbers is 17.
"hola", "alo", "bueno" In Spain (not Latin America) the most used word to answer a phone call is "Diga" or "Dígame" To ask for a telephone number you would say ¿Cuál es tu número de teléfono? To tell what your telephone number is you must say the numbers individually one after another, this way nine three (or ninety three, because it is the prefix) four-five-one-six- eight-four-two (this is an example)
210 is the number whose prime factors are the first four primes unrepeated.
YES. YES.
Any real number to the first power is the number itself.
In the field of telecommunications in the UK, STD stands for 'subscriber trunk dialling' and is a hangover from the time when telephone users could 'phone straight through to a telephone controlled by another telephone exchange (prior to that, you had to ask the operator to put you through) The STD code is the first four (now five) digits of the full telephone number. The term STD is now a largely defunct term.
the second pair of three numbers before the set of four numbers for example 386->249<-5484 ps this number is a fake number so dont call it lol
Chatsworth House Derbyshire can be contacted through email or twenty-four hour telephone. Their telephone number is 01246 565300 and their email can be reached through the Contact Us page on their website.