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Hexadecimal (also known as base-16 or simply hex) is a positional numeral system that represents numbers using a radix (base) of sixteen. Unlike the decimal system representing numbers using ten symbols, hexadecimal uses sixteen distinct symbols, most often the symbols "0"–"9" to represent values 0 to 9 and "A"–"F" to represent values from ten to fifteen.
The number 18 is a harshad number in base 10, because the sum of the digits 1 and 8 is 9, and 18 is divisible by 9.; The Hardy–Ramanujan number (1729) is a harshad number in base 10, since it is divisible by 19, the sum of its digits (1729 = 19 × 91).
The first true written positional numeral system is considered to be the Hindu–Arabic numeral system.This system was established by the 7th century in India, [1] but was not yet in its modern form because the use of the digit zero had not yet been widely accepted.
Salvator Mundi by Italian artist Leonardo da Vinci (c. 1500). This is a list of the highest known prices paid for paintings.The record is approximately US$450.3 million (which includes commission), paid for Leonardo da Vinci's Salvator Mundi (c. 1500).
Snow White and the Seven Dwarfs is a 1937 American animated musical fantasy film produced by Walt Disney Productions and released by RKO Radio Pictures.Based on the 1812 German fairy tale by the Brothers Grimm, the production was supervised by David Hand, and was directed by a team of sequence directors, including Perce Pearce, William Cottrell, Larry Morey, Wilfred Jackson, and Ben Sharpsteen.
On 6 and 9 August 1945, the United States detonated two atomic bombs over the Japanese cities of Hiroshima and Nagasaki, respectively.The bombings killed between 150,000 and 246,000 people, most of whom were civilians, and they remain the only use of nuclear weapons in an armed conflict.