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How many 7 digit telephone numbers are possible using the digits 0 through 9 if the first digit must be 9?
Wiki User
∙ 12y ago
9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1
Wiki User
∙ 12y ago
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What is the probability of three digit numbers without repeated digits with numbers 0123456?
It is possible to create a 3-digit number, without repeated digits so the probability is 1.
How many of the numbers from 10 through 98 have the sum of their digits equal to a perfect and 8203 square?
There are 17 such numbers.
How many digits are there from 1 to 400?
This can be solved by looking at each set of digit lengths. From 1 through 9, it's obvious there are 9 digits. From 10 through 99, there are 2 digits for each of the 90 numbers, so that makes 90*2=180 digits. Next, from 100 to 400, there are 401 numbers with 3 digits each, making another 401*3=1,203 digits. So the final answer is 9+180+1,203 = 1,392 digits.
How many numbers from 10 through 84 have the sum of their digits equal to a perfect square?
14
How many possible 4 number combinations can you get using numbers 0-9?
0000-9999 (10x10x10x10 or 104) = 10,000 possible combinations allowing for repeated digits. If you are not able to repeat digits then it's 10 x 9 x 8 x 7 or 5,040 possible combinations without repeated digits.
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).
What is the number of 5 digit telephone numbers having atleast one of their digits repeated?
5 digit telephone numbers having at least one of their digits repeated is = total possible 5 digit telephone numbers - 5 digit telephone numbers without any digit being repeated. =(10*10*10*10*10)-(10*9*8*7*6) =100000-30240 =69760
How many digits are there in Dubai telephone numbers?
7
How many 6-digits telephone numbers can have one or more repeated digits?
763920
Why were the first telephone numbers only a couple of digits?
because they didnt know the other digits.
A telephone company wants to create as many 7-digit phone numbers as possible without changing the first 3 digits How many phone numbers can be created?
10,000
How many digits are there in Turkish telephone numbers?
Telephone numbers in Turkey consist of the telephone country code +90, followed by a three-digit area code and a 7-digit subscriber number.
How many digits are there in a phone number in Russia?
Telephone numbers throughout Russia are uniformly 3 digits for the area code plus 7 digits for the local number.
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.
How many numbers does Lesotho have?
A telephone number in Lesotho are eight digits long with the first two numbers being its area code.
What are the possible combinations of the digits 0 through 9 if number may be repeated in the sequence?
Infinite. If numbers can be repeated, the list could go on nonstop.
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.
