What is facts about number 30?

1. 30 is an even number.
2. It is a composite number because it can be divided evenly by other numbers besides 1 and itself, such as 2, 3, 5, 6, 10, 15.
3. 30 is the sum of the first four odd numbers: 1 + 3 + 5 + 7 = 16; and the sum of the first three perfect squares: 1 + 4 + 9 = 14.
4. The 30th parallel north and south are lines of latitude that circle the Earth at a distance of approximately 30 degrees from the equator.
5. In chemistry, 30 is the atomic number of zinc (Zn) and the molar mass of sulfuric acid (H2SO4) is 30.04 g/mol.
6. In sports, the number 30 is often associated with the goalkeeper in soccer, the pitcher in baseball, and the point guard in basketball.
7. 30 Seconds to Mars is an American rock band led by actor Jared Leto.
8. In the Old Testament, Moses was 40 years old when he went up Mount Sinai to receive the Ten Commandments and lived another 30 years after that.
9. The Roman numeral for 30 is XXX.
10. Pearl Jubilee is celebrated on the 30th anniversary of one's marriage.