Number 6: The number of man (without God), imperfection and human weakness. Also symbolizes the evils of Satan and the manifestation of sin.
Number 7: The entire Word of God is founded on the number seven. It is the number of completeness and spiritual perfection. It is tied directly to God’s creation of the heavens and earth.
Number 8: Coming after seven, which signifies completeness, the number eight symbolizes a new beginning, or a new order of things, a new creation, a new birth, and the resurrection of saints to eternal life.
Number 9: Pictures finality or divine completeness from the Lord. It is significant of the end of man, and the summation of all man's works. Nine is, therefore, the number of judgment.
Number 10: Signifies testimony, law and responsibility. Ten is also viewed as a complete number (like three, seven and twelve) which symbolizes the perfection of Divine order.
Number 11: Stands for disorder, judgment, disorganization, imperfection and disintegration.
Number 12: Stands for divine authority and appointment, as well as governmental foundation (governmental perfection), perfection, and completeness.
Number 40: Points to trial, testing, and chastisement or to probation and prosperity.
To find out the full Biblical meaning of a particular number please use the below set of links.