1 (number) facts for kids
|Roman numeral (unicode)||Ⅰ, ⅰ|
|Greek prefix||mono- /haplo-|
|Persian||١ - یک|
|Bengali & Assamese||১|
In mathematics, 1 is the multiplicative identity of common numbers. It is sometimes called the "unity". It is also the only number for which these special facts are true.
- Any number n multiplied by 1 equals that number: n × 1 = n. For example, 7 × 1 = 7.
- Any number n divided by 1 equals that number: n / 1 = n. For example, 7 / 1 = 7.
- Any number n, other than 0, divided by itself always equals 1: n / n = 1. For example: 7 / 7 = 1.
- 1 cannot be divided with any other number so that the result is a natural number.
- In Germany and Austria, one is the grade for "very good". It is the best grade of six possible grades in Germany, and the best of five possible grades in Austria. In the Netherlands, one is the lowest grade, and ten the highest and the best. In Poland, one is also the lowest grade, but the highest is six.
- In numerology, the number one is a symbol for everything (unity), the beginning, and God.
Images for kids
The 24-hour tower clock in Venice, using J as a symbol for 1.
1 (number) Facts for Kids. Kiddle Encyclopedia.