Example image of eyePlorer eyePlorer map for 'Sexagesimal': 60 (number) Numeral system Radix 3rd millennium BC Babylonia Sumer Factorization Highly composite number Prime number Fraction 10 (number) Digit Mesopotamia Cuneiform script Sign-value notation Ten Positional notation 0 (number) Chinese calendar Sexagenary cycle Western New Guinea Angle Time Hour Minute Decimal 360 (number) Degree (angle) Minute of arc Second Methuselah's Children Robert A. Heinlein Decipher (novel) Stel Pavlou Plato The Republic (Plato) Fraction (mathematics) Integer factorization Regular number Repeating decimal Chaldea Hipparchus Tropical year Alfonsine tables Gregorian calendar Ptolemy Jamshīd al-Kāshī Binary clock Babylonian numerals History of timekeeping devices