7
Because the Greeks were an advanced civilization
The 7 most important things needed for a civilization are: 1) food production, 2) shelter, 3) social organization, 4) communication systems, 5) government structure, 6) transportation networks, and 7) cultural identity or shared beliefs.
The most common type of tubular lock typically features 7 pins. While 8 and 10-pin versions do exist, the 7-pin design is widely used in various applications due to its balance of security and manufacturing simplicity. This makes it a popular choice for applications like vending machines and bike locks.
Size 7 is the most common size of a woman's ring.
21.
7
Li-7
it is either 3 or 7
most common countries
Probably 1,3 or 7
The GCF is 7.