Best Answer

That makes:* 8 options for the first digit

* 8 options for second digit

* 10 options for the third digit

* ... etc.

Just multiply all the numbers together.

User Avatar

Wiki User

6y ago
This answer is:
User Avatar
More answers
User Avatar

Wiki User

6y ago

There can be 6400000 such numbers.

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: How many seven-digit telephone numbers are possible if the first two digits cannot be ones or zeros?
Write your answer...
Still have questions?
magnify glass
Related questions

How do you know when to put dashes in numbers?

If this is a question about prime numbers as the question category suggests, then never. Because a prime number cannot be negative and - if it were relevant - must be a whole number. I guess it would be possible to suggest: when a telephone number is a prime number?

Can 2 binomials have a monomial product?

No, they cannot with real numbers. With complex numbers it is possible.

How many 7 digit telephone numbers can be formed the first digit cannot be zero?

9,000,000 if there are no other requirements.

How do you dial a cell phone number from a lap top computer?

In general, laptop computers cannot dial telephone numbers.

What is a real telephone number?

A real telephone number is a telephone number that is live and connects to a landline or mobile device. There are different telephone numbers available that people don't recognise or insider not correct, this relates especially to non geographic numbers such as numbers like 0870, 0844 or when you need to dial the full area dialling code (STD) although the number should not need to be dialled in full. There are also false made up numbers such as on television shows when a real live telephone number cannot be displayed for obvious reasons.

How many phone numbers are possible for a certain area code Assume that zero cannot start an area code or the first digit of the number itself Which method should be used to solve this problem?

There are some necessary parameters missing in your problem as written above. You need to know, first and foremost, how many digits in a telephone number. In the USA and Canada, that is always 7, but in some countries it may be more or less than that, and some places even have different lengths of telephone numbers within the same city or town, but that would be beyond the scope of this type of word problem. A digit with no restrictions has ten possible values. The restriction that the first digit cannot be zero reduces that position to 9 possible values. Multiply together the number of possible values for each digit of the telephone number. For example, if you have a 7-digit phone number, and the only restriction is that the first digit cannot be zero, then you have 9 x 10 x 10 x 10 x 10 x 10 x 10 x 10 = 9,000,000 possible telephone numbers In reality, there are about 7.9 million possible phone numbers in any given US or Canadian area code, because there are additional restrictions on the first three digits. For example, a number can begin with 4, and can even begin with 41, but cannot begin with 411.

What are the toll free telephone numbers for Allstate?

If you wish to speak with an Allstate agent in your area, or Allstate insurance central, you will first visit the Allstate website where you will find various telephone numbers. The telephone numbers of individual agents cannot be advertised in answers. WikiAnswers does not permit advertising in the body of answers. See Sources and Related Links, further down this page, for the Allstate website. .

What is JAZZAR in calculater?

Unfortunately, a person cannot find the numbers or symbols by using the letters JAZZAR and a calculator. The numbers and symbols for JAZZAR using a telephone keypad are 5 2 # # 2 *.

How many three digit even numbers are possible if the left digit cannot be zero?


How do you turn 26 into a Reduced Fraction?

You cannot turn whole numbers into reduced fractions. Whole numbers are as reduced as possible. The fraction is 26/1

Where does telephone expense paid personally go?

Could you rephrase and resubmit your question. This cannot be answered the way it is written. Please be specific. This way you get the best answer possible.

Where is telephone country code 114?

Telephone country code +1 is North America (USA, Canada, etc.), but there are no valid numbers beginning with +1 1.