Do you know the (7) has a meaning!!!

1)Number of layer of the sky(7)
2)Numberof days in a week(7)
3)The gates of hell(7)
4)Number of seas(7)
5)Wonder of world(7)
6)The visible light (7)colours
7)(7)Takbeer of Eid
8)Number of verses in surat-ul-fatiha(7)
9)Allah commmands prayer at the age 0f(7)Number of seeking between safa and marwa(7)
10)Major minerals in the earth(7)
11)Number of continets of the world(7)