55 (number)
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|---|---|---|---|---|
| Cardinal | fifty-five | |||
| Ordinal | 55th (fifty-fifth) | |||
| Factorization | 5 × 11 | |||
| Divisors | 1, 5, 11, 55 | |||
| Greek numeral | ΝΕ´ | |||
| Roman numeral | LV, lv | |||
| Binary | 1101112 | |||
| Ternary | 20013 | |||
| Senary | 1316 | |||
| Octal | 678 | |||
| Duodecimal | 4712 | |||
| Hexadecimal | 3716 | |||
55 (fifty-five) is the natural number following 54 and preceding 56.
Mathematics
[edit]
55 is composite number,[1] a Fibonacci number[2] and a Triangular number.
Transportation
[edit]In the United States, the National Maximum Speed Law prohibited speed limits higher than 55 miles per hour (90 km/h) from 1974 to 1987. The number 55 became a popular shorthand for the 55 mph speed limit. For example, a hand with a pair of fives in Texas hold'em poker is referred to as a "speed limit".[3]
References
[edit]- ↑ "A002808 - OEIS". oeis.org. Retrieved 2024-11-20.
- ↑ "Sloane's A000045 : Fibonacci numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
- ↑ McComas, Richard (2004-12-05). "400+ Hole Card Hand Names". Retrieved 2008-10-11.
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