www.reference.com/article/definition-natural-number-4667647fc25edb40

A natural number is the sort of number that is commonly used for counting or basic arithmetic. They are positive whole numbers, such as one, two or three, and are used to denote quantities in everyday life.

www.reference.com/article/u-s-naturalization-number-e2e581b537462e7b

A naturalization number refers to a C-File number, which refers to the certificate file number printed in red on a U.S. Certificate of Naturalization. C-File numbers have been provided since 1906, according to the U.S. Citizenship and Immigration Services website.

www.reference.com/article/natural-numbers-bd070b5fad80cff6

In mathematics, natural numbers are whole numbers starting with 1 and going upward. In some fields, the natural numbers start with 0 but, ultimately, natural numbers do not include negative numbers or fractions.

www.reference.com/world-view/list-first-10-natural-numbers-b6e5ad7884d91f73

The first 10 natural numbers are 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10. A natural number refers to any integer that is equal to or greater than 1, although 0 is included in some mathematical fields.

www.reference.com/world-view/difference-between-whole-numbers-natural-numbers-d0624b7f9243f957

The only difference between natural numbers and whole numbers is that a zero is included when mentioning whole numbers. Both natural and whole numbers are positive integers and, therefore, don't have any fraction or decimal part.

www.reference.com/article/set-natural-numbers-less-equal-8-a8f6885c91fe8d9a

The set of natural numbers that is less than or equal to eight is {0, 1, 2, 3, 4, 5, 6, 7, 8}. A natural number is zero or any whole positive number. The numbers zero through seven are included because they are less than eight and fit the definition.

www.reference.com/article/zero-natural-number-9b554dce5bcbf539

Including zero in the set of natural numbers is a matter over which mathematicians disagree. While Dictionary.com includes zero in the set of natural numbers, the University of Iowa specifies natural numbers as a set beginning with one. The university includes zero in the set of whole numbers.

www.reference.com/world-view/non-real-number-d0a54acfa60d98b9

A non-real, or imaginary, number is any number that, when multiplied by itself, produces a negative number. Mathematicians use the letter "i" to symbolize the square root of -1. An imaginary number is any real number multiplied by i. For example, 5i is imaginary; the square of 5i is -25.

www.reference.com/article/can-naturalization-certificate-number-118e6aa0e6cd209a

The United States naturalization certificate number is printed with red ink on the top of all certificates of naturalization issued since September 27, 1906, according to the U.S. Citizenship and Immigration Services. Naturalization petitions filed after June 1906 may have a blank on the space for i

www.reference.com/world-view/list-first-10-natural-numbers-b6e5ad7884d91f73

The first 10 natural numbers are 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10. A natural number refers to any integer that is equal to or greater than 1, although 0 is The first 10 natural numbers are 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10. A natural number refers to any integer that is equal to or greater than 1, al