| 
 | ||||
|---|---|---|---|---|
| Cardinal | eighty | |||
| Ordinal | 80th (eightieth) | |||
| Factorization | 24× 5 | |||
| Divisors | 1, 2, 4, 5, 8, 10, 16, 20, 40, 80 | |||
| Roman numeral | LXXX | |||
| Binary | 10100002 | |||
| Ternary | 22223 | |||
| Quaternary | 11004 | |||
| Quinary | 3105 | |||
| Senary | 2126 | |||
| Octal | 1208 | |||
| Duodecimal | 6812 | |||
| Hexadecimal | 5016 | |||
| Vigesimal | 4020 | |||
| Base 36 | 2836 | |||
| Hebrew | פ (Peh) | |||
80 (eighty) is the natural number following 79 and preceding 81.
80 is:
The Pareto principle (also known as the 80-20 rule) states that, for many events, roughly 80% of the effects come from 20% of the causes.
Every solvable configuration of the Fifteen puzzle can be solved in no more than 80 single-tile moves.
Jerry Rice wore the number 80 for the majority of his NFL career. The number 80 is also the retired number of Seattle Seahawks wide receiver Steve Largent; when Rice was traded to the Seahawks, Largent gave the team permission to unretire his number so Rice could wear it.
Eighty is also: