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How many area codes can you make without 0 and 1 in the first digit and the second has to be 0 and 1?
Wiki User
∙ 10y ago
With the restrictions specified in your question, there are 8 x 2 x 10 = 160 possible area codes.
However, those restrictions do not match the restrictions on actual area codes in North America (USA, Canada, etc.). North American area codes have the first digit not 0 or 1, the second digit not 9, and the third digit not the same as the second digit (such codes are reserved for special purposes like toll-free), leaving 8 x 9 x 9 = 648 possible area codes.
Wiki User
∙ 10y ago
Wiki User
∙ 11y agoIt depends on the other restrictions you place on possible area code numbers. Many countries have area codes of variable length.
If you have a three-digit area code (as in North America, Turkey, or Russia) with no restrictions other than that the first digit cannot be 0, that leaves 900 possibilities.
The actual restrictions on area codes in North America are that the first digit cannot be 0 or 1, the second digit cannot be 9, and the third digit cannot be the same as the second. That leaves only 648 possibilities, not including special codes like 800. (The 72 codes with the second and third digits the same are reserved for special purposes.)
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How many possible 3 digit area codes can be created without repeating a number?
The number of 3-digit numbers with no repeated digits is simply 10x9x8 = 720, if you allow, for example, 012 as a 3-digit number. There are 10 digits, any of which might be the first digit. The second digit can be any digit except the digit that was used for the first digit, leaving 9 possibilities. The third digit then has 8 possibilities, since it can't be the same as the first or second digit. The actual number of possible area codes will be lower, because there are additional restrictions on the number combinations for a valid area code. For example, in North America (USA, Canada, etc.), the first digit of an area code cannot be 0 or 1 and the middle digit cannot be 9.
How do you multiply by 2 or 3 digit numbers?
first digit time second digit and second digit times first digit then repeat
Can you check for codes on a 1994 Plymouth colt without a scan tool It has the on board diagnostic two style pin?
No, you cannot use an OBD scan tool. The DRB2 connection you are referring to can be used by a mechanic with the proper tools. You can read the codes by the key method. Turn the key on, then off, then on, then off, and finish with on. The codes will then flash the number of the first digit then it will pause and blink the number of the second digit.
Is a 3-digit number all the digits are different the first and second digits are multiples of 3 the first digit is greater than the second digit?
Not necessarily. Consider 444. The digits are not different. The first and second digits are not multiples of 3 The first digit is not greater than the second digit. In spite of all that, 444 is a 3-digit number
How many codes are possible with 2 letters and one digit if no letter or digit appear more than once?
There are 26 choices for the first letter, 25 choices for the second letter (since we can't repeat the first letter), and 10 choices for the digit. Therefore, the total number of possible codes is: 26 x 25 x 10 = 6,500 So there are 6,500 possible codes with 2 letters and one digit if no letter or digit appears more than once.
How many 4 digit codes can you get from the numbers 1 2 3 4 and 5?
For the first digit you have 5 options, whichever you choose for the first digit, you have 4 options for the second digit, etc.; so the number of combinations is 5 x 4 x 3 x 2.For the first digit you have 5 options, whichever you choose for the first digit, you have 4 options for the second digit, etc.; so the number of combinations is 5 x 4 x 3 x 2.For the first digit you have 5 options, whichever you choose for the first digit, you have 4 options for the second digit, etc.; so the number of combinations is 5 x 4 x 3 x 2.For the first digit you have 5 options, whichever you choose for the first digit, you have 4 options for the second digit, etc.; so the number of combinations is 5 x 4 x 3 x 2.
How do you turn two digit numbers in to tens?
If the second digit is 1, 2, 3 or 4 replace it by 0. If the second digit is 6, 7, 8 or 9 replace it by 0 and increase the first digit by 1. If the second digit is 5, then, if the first digit is even, replace the second digit by 0, if the first digit is odd, replace the second digit by 0 and increase the first digit by 1. Many people will require that 5 as the second digit should be treated the same as 1-4. This ignores the upward bias introduced and IEEE 754 standard for rounding.
What is the four digit number in which the first digit is one third of the second the third is the sum of the first and second and the last is three times the second?
1349
What is bigger 0.1666666667 or 0.06666666667?
Look for the first digit that is different. In this case, the first digit after the decimal point. The number that has the larger digit in this position, is larger. If the first digit is the same, compare the second digit with the second digit, the third digit with the third digit, and so forth, until you find a difference.
The first digit of a three digit is 2 greater than the second digit the last digit is 4 times the first digit what is the number?
208
How many possible area codes can you get without using 0 as the first number?
It depends on how many digits in an area code. North America (USA, Canada, etc.) uses a uniform system of 3-digit area codes, but many other countries do not. Assuming a 3-digit area code and no other restrictions other than "first digit not zero," that leaves 900 possible area codes.
You are a three digit number your second digit is four times more than your third digit your first digit is seven less than your second digit?
182
