The Bible doesn't specifically mention astrology and numerology, but the Old and New Testaments are crystal clear in their condemnation of divination as a dangerous and deceptive spiritual practice. The instructions for God's people as they entered the Promise Land were clear:
"There shall not be found among you any one that maketh his son or his daughter to pass through fire, or that useth divination, or an observer of times, or a enchanter, or a witch, or a charmer, or a consulter with familiar spirits, or a wizard, or a necromancer. For all that do these things are an abomination unto the Lord," Deuteronomy 18:10-12.
The prophet Ezekiel condemned "vain vision [and] flattering divination" which were misleading the people of Israel. In the book of Revelation the final words in the New Testament proclaim blessings for those lives practitioners of spiritual rebellion: "For without are dogs, and sorcerers, and whore-mongers, and murders, and idolaters, and whosoever loveth and maketh a lie."
Interestingly, the Bible doesn't say that those who practice divination are always wrong in their findings. In fact, Acts records an incident in Philippi where Paul and Silas were preaching. One day on their way to prayer, the two evangelists encountered a slave girl who told fortunes for pay and earned a healthy income for her owners. The girl told the gospel truth about Paul and Silas:
"These men are the servants of the most high God, which shew unto us the way of salvation." But after a few days of this, Paul became troubled and cast a spirit out of the girl, an action that angered her owner and caused the two evangelists to be dragged before the town magistrates, who ordered them to be stripped and flogged.
Then, as now, followers of Christ proclaim a radically different way of knowing God and learning spiritual truth. Even in other means sometimes provides deceptive answers. Today, Christians who oppose divination may not get flogged, but there are increasing signs that occultic ways of seeking the truth are challenging the Christian worldview in the marketplace of spirituality.