50 (number) Wikipedia. In mathematics [ edit] Fifty is the smallest number that is the sum of two non-zero square numbers in two distinct ways: 50 = 1 2 + 7 2 = 5 2 + 5 2. [1] It is also the sum of three squares, 50 = 3 2 + 4 2 + 5 2, and the sum of four squares, 50 = 6 2 + 3 2 + 2 2 + 1 2. It is a Harshad number. [2]
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50 may refer to: 50 (number) one of the following years 50 BC, AD 50, 1950, 2050 .50 BMG, a heavy machine gun cartridge also used in sniper rifles .50 Action Express, a large pistol cartridge commonly used in the Desert Eagle .50 GI, a wildcat pistol cartridge .50 Beowulf, a powerful rifle cartridge used in the AR-15 platform .50 Alaskan, a.
