12

• Twelve is a natural number following eleven and preceding thirteen.
• It is an even number.
• It is the smallest composite number that is not a prime number.
• It is the second smallest square number after one.
• It is the third smallest triangular number after one and three.
• It is the fifth smallest Fibonacci number after 0, 1, 1, and 2.
• It is the number of months in a year.
• It is the number of signs in the zodiac.
• It is the number of hours in half a day.
• It is the number of inches in a foot.
• It is the number of eggs in a dozen.
• It is the number of jurors in a typical trial jury.
• It is the number of tones in the chromatic scale.
• It is the number of notes in an octave.
• It is the atomic number of magnesium.