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Phone numbers are seven digits long in some countries but differing lengths in others. It purely depends upon what number of phone numbers the country needs .

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Q: Why are phone numbers seven digits long?
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Continue Learning about Other Math

You are a five digit number your digits increase in size from the left Each digit is different your first and fifth digits are square numbers your first and fourth digits are cubed numbers your 2nd?

There are a lot of possibilities. The second digit can be 2 through 6, the third digit can be 3 through 7 as long as it is larger than the second digit. What we have so far: 1 _ _ 89


How long would it take to recite all the known digits of PI?

Infinitely long since there is an infinite number of digits.


What is the meaning for Armstrong number?

Armstrong numbers are the sum of their own digits to the power of the number of digits. EXAMPLES: 370 = 33 + 73 + 03 = 27 + 343 + 0 = 370 9474 = 94 + 44 + 74 + 44 = 6561 + 256 + 2401 + 256 = 9,474 The largest know Armstrong number (in base 10) is 39 digits long: 115,132,219,018,763,992,565,095,597,973,971,522,401 ( I have no idea how to say that number.)


What is a non integer?

Real Numbers is an alternative to integers. Real Numbers include both rational numbers, such as 42 and −23/129, and irrational numbers, such as pi and the square root of two; or, a real number can be given by an infinite decimal representation, such as 2.4871773339..., where the digits continue in some way; or, the real numbers may be thought of as points on an infinitely long number line. * * * * * Real numbers are not an ALTERNATIVE to non-integers since integers are a subset of real numbers! Otherwise the answer is OK.


Is it true that all decimal numbers rational numbers?

Short answer: yes.Irrational numbers like PI have what are called "decimal expansions." For PI, decimal expansions would be numbers like:3.143.141593.141592653589793238etc.These expansions are, themselves, rational numbers.The thing is, an irrational number has an infinitely long, non-repeating sequence of digits after the decimal point. While these digits can be computer forever to a precision limited only by how much effort a person is willing to put into it, they cannot be exactly represented as decimal numbers. Any possible finite decimal number that you come up with will not be a perfect representation of an irrational number.So strictly speaking, I would say that a decimal number can only ever represent a rational number.

Related questions

Why are phone numbers 7 digits?

Because then they are more complicated so there can be more phone numbers. Imagine if phone numbers were 3 numbers long! We would have run out a long time ago.


What kind of phone has only five digits?

A large company, a small town, or a very small country may have telephone numbers that are 5 digits long.


How many numbers do you have to dial in a long distance telephone number?

1, the area code(3), and a seven digit number. Eleven digits in all.


How do you say 67334270 in Spanish?

long numbers, such as account number and phone numbers are said using individual digits:67334270 = seis siete tres tres cuatro dos siete cero


When were telephone numbers in Australia only 7 digits long?

Prior to 1993, most Australian PSTN telephone numbers were seven or six digits long, not including the area code. With the introduction of new carriers into the network, it was perceived that the number ranges should be increased, so all PSTN numbers had at least one digit added to the front. Now, if dialling local numbers, all PSTN numbers have 8 digits, 10 including the area code. This process was completed in 1996.


How do dividing 2digit by 1 digit numbers?

to do it the long way do it by long division to do it the short way put it in the calculator 2 digits numbers are just the numbers between10-99 and one digits numbers are just the numbers between 0-9.


How many numbers used in PIN at ATM?

It is usually 4 digits. Some banks offer pin numbers that are more than 4 digits long.


How many digits is a car key code?

On a Chrysler producit is 5 digits long. One letter and four numbers.


What do the digits in Assessor's Parcel Numbers signify?

Assessor Parcel Numbers (APN) are 8 digits long. The standard formatting for the numbers is 000-000-00. The book number is the first three digits. The page number is the next two digits. Your APN can be found on your value notice or tax bill.


How many seven digit telephone numbers are possible if the first number is not allowed to be 0 or 1?

8,000,000 million telephone numbers are possible with these conditions, corresponding to the numbers 2,000,000 - 9,999,999. Many countries have forced dialing of the area code now, creating telephone numbers with a minimum of 10 digits. This means there are 8 million possible telephone numbers in each area code. (area code of 3 digits long).


How long is the numbers on a credit or debit card?

Generally 16 digits in 4 groups


How many digits does Lesotho number have?

A telephone number in Lesotho are eight digits long with the first two numbers being its area code.