55 (number)

S1 guest-n5emy 2026-09-16 13:11:03

# 55 (number) 55 (fifty-five) is the natural number following 54 and preceding 56. 55 is composite number, a Fibonacci number and a Triangular number. 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".