9 (number)
| ||||
|---|---|---|---|---|
| Cardinal | nine | |||
| Ordinal | 9th (ninth) | |||
| Factorization | 32 | |||
| Roman numeral | IX | |||
| Unicode symbol(s) | Ⅸ, ⅸ | |||
| Greek prefix | ennea- | |||
| Latin prefix | nona- | |||
| Binary | 10012 | |||
| Ternary | 1003 | |||
| Quaternary | 214 | |||
| Quinary | 145 | |||
| Senary | 136 | |||
| Octal | 118 | |||
| Duodecimal | 912 | |||
| Hexadecimal | 916 | |||
| Vigesimal | 920 | |||
| Base 36 | 936 | |||
| Amharic | ፱ | |||
| Arabicl | ٩ | |||
| Urdu |  | |||
| Armenian numeral | Թ | |||
| Bengali | ৯ | |||
| Chinese/Japanese /Korean numeral | 九 (jiu) 玖 (formal writing) | |||
| Devanāgarī | ९ (Nao) | |||
| Greek numeral | θ´ | |||
| Hebrew numeral | ט (Tet) | |||
| Tamil numeral | ௯ | |||
| Khmer | ៩ | |||
| Telugu numeral | ౯ | |||
| Thai numeral | ๙ | |||
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9 (nine) is the Arabic number which comes after 8, before 10, and two before eleven. It is an odd number, and is the highest single-digit number. It is also a square number. In Roman numerals, nine can be written as IX.
The number also looks like an inverted 6. To tell the difference between the two, they are often underlined. Some people also write the number 9 like a lowercase letter "q" to make it different from the 6.
Mathematics
The number nine (9) takes the shape of an upside-down six (6), is a multiple of 3, and the third square number after 4.
Nine is also a composite number, having the factors: 1, 3 and 9 itself. Nine is the first odd composite number
9 (number) Media
- Evoglyph
- TextFigs
Seven-segment digital numeral of 9
9 is a Motzkin number: it counts the ways of drawing non-intersecting chords among four points on a circle, allowing some points to remain unmatched.
Four concentric magic circles with 9 in the center (by Yang Hui), where numbers on each circle and diameter around the center generate a magic sum of 138.
The "nine dots" puzzle. The puzzle asks to link all nine dots using four straight lines or fewer, without lifting the pen.
Nine-pointed star, a symbol of the Baha'i Faith.
Gold bullion with four nines denoting 99.99% purity'; a decimal comma is used here
