A typical U.S. telephone number consists of the country code +1, followed by a three-digit area code and a seven-digit subscriber number, for a total of 10 digits for the national number or 11 digits for the full international number.
For example, (419) 555-0123 [fictional number in Toledo, Ohio] becomes +1 419 555 0123 in international format.
The only exceptions to the rule are special cases like the 911 emergency number.
The leading digits refers to the first numbers in the typical way from left to right. For instance, for a number like 2837. 258, the leading digits are 2 and 8.
Digits is how many numbers you have in a number. If you have the number 4 it has one digit if you have the number 20 it has two digits and if you have the number 558 it has three digits. So basically in the number 1085 it has 4 digits because there is 4 numbers in it, the numbers are 1,0,8 and 5. Hoped you understand.
A typical credit card has sixteen numbers. The first set of six digits number is the issuer identifier, and the last digit number is called the check digit that is generated to satisfy certain conditions. The set of nine digits number left in the middle is the account number of the credit card. www.creditcardshelplines.com
Armstrong numbers are the sum of their own digits to the power of the number of digits.
roman numbers............
In the numbers 1-9 each number has 1 digit and there are 9 of them, so that's 9.In 10-99 each number has 2 digits, and there are 90 of them: 2x90 = 180There are 900 three digit numbers [100 through 999]: 2700 digits.There are 9000 four digit numbers: 36000 digits.90,000 numbers with five digits: 450,000 digits.900,000 numbers with six digits: 5,400,000 digits.Then 1 number with seven digits: 7 digits.Add them up and you have 5,888,896 digits.
3.14 has a finite number of digits. All numbers with a finite number of digits are rational. Pi has an infinite number of digits, AND the digits don't repeat in a regular pattern. (Numbers with repeating decimals are rational as well.)
The significant digits in a number can be arbitrarily small or large in number, according to the method of creating them.Numbers that can have an infinite number of possible significant digits are called transcendental numbers.
A number with 22 DIGITS (not numbers) is of the order of a sextillion.
the number one.
a 8-digits palindromic number is a number consisting of a 4-digits number written and then written backward, i.e. 1234 4321 so there are as many palindromic 8-digits numbers as 4-digits numbers so from 1000 to 9999, so there are 8999 palindromic 8 digits number (I assumed that 00011000 is not to be considered as a valid 8 digit number)
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