<P> Pythagorean triples have been known since ancient times . The oldest known record comes from Plimpton 322, a Babylonian clay tablet from about 1800 BC, written in a sexagesimal number system . It was discovered by Edgar James Banks shortly after 1900, and sold to George Arthur Plimpton in 1922, for $10 . </P> <P> There are 16 primitive Pythagorean triples with c ≤ 100: </P> <Table> <Tr> <Td> (3, 4, 5) </Td> <Td> (5, 12, 13) </Td> <Td> (8, 15, 17) </Td> <Td> (7, 24, 25) </Td> </Tr> <Tr> <Td> (20, 21, 29) </Td> <Td> (12, 35, 37) </Td> <Td> (9, 40, 41) </Td> <Td> (28, 45, 53) </Td> </Tr> <Tr> <Td> (11, 60, 61) </Td> <Td> (16, 63, 65) </Td> <Td> (33, 56, 65) </Td> <Td> (48, 55, 73) </Td> </Tr> <Tr> <Td> (13, 84, 85) </Td> <Td> (36, 77, 85) </Td> <Td> (39, 80, 89) </Td> <Td> (65, 72, 97) </Td> </Tr> </Table> <Tr> <Td> (3, 4, 5) </Td> <Td> (5, 12, 13) </Td> <Td> (8, 15, 17) </Td> <Td> (7, 24, 25) </Td> </Tr>

Pythagorean triplet in which one number is 12 is