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⇱ 9 (number) - Simple English Wikipedia, the free encyclopedia

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← 8 9 10 →
-1 0 1 2 3 4 5 6 7 8 9 →
Cardinalnine
Ordinal9th
(ninth)
Numeral systemnonary
Factorization32
Greek numeralΘ´
Roman numeralIX
Unicode symbol(s)Ⅸ, ⅸ
Greek prefixennea-
Latin prefixnona-
Binary10012
Ternary1003
Quaternary214
Quinary145
Senary136
Octal118
Duodecimal912
Hexadecimal916
Vigesimal920
Base 36936
Amharic፱
Arabicl٩
Urdu👁 Image
Armenian numeralԹ
Bengali৯
Chinese/Japanese
/Korean numeral		九 (jiu)
玖 (formal writing)
Devanāgarī९ (Nao)
Greek numeralθ´
Hebrew numeralט (Tet)
Tamil numeral௯
Khmer៩
Telugu numeral౯
Thai numeral๙
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Pronunciation of the number 9

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.

Mathematics

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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

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