50/50

5050 or variation, may refer to:A.D. 5050, a year in the 6th millennium CE 5050 BC, a year in the 6th millennium BCE 5050 (number), a number in the 5000s range 5050 Doctorwatson, an asteroid in the Asteroid Belt, the 5050th asteroid registered Nagoya Municipal Subway 5050 series, an electric multiple unit train type Tobu 5050 series, a variant of the Tobu 5000 series electric multiple unit train type Tokyu 5050 series, an electric multiple unit train type USAir Flight 5050, a 1989 flight that crashed on takeoff from LaGuardia, New York City, US The Sequence of the first 100 numbers