Bible difficulties, or apparent Bible contradictions, exist. The opponents of Christianity often use them in their attempts to discredit Christianity. Sometimes these attacks undermine the faith of Christians who either don't understand the issues or don't have the resources to deal with them.
Opponents of Christianity will cite what they consider a Bible contradiction or difficulty by comparing one verse to another (or more) that seems to disagree with the first. In doing this, several verses are often referenced as being contradictory or problematic. Therefore, to make this section of CARM easy to use, it is arranged by verse for easy lookup. Since many of the same "difficulties" deal with one verse in opposition to another or even several others, I have listed all the verses addressed in the same answer. This makes the initial list look larger than it really is. For example, how many animals did Noah bring into the ark? Genesis 6:19-20 says two while Gen. 7:2-3 mentions seven. Therefore, both verses are listed and both links point to the same answer.
http://carm.org/introduction-bible-difficulties-and-bible-contradictions
If we read the Bible at face value, without a preconceived bias for finding errors, we will find it to be a coherent, consistent, and relatively easy-to-understand book. Yes, there are difficult passages. Yes, there are verses that appear to contradict each other. We must remember that the Bible was written by approximately 40 different authors over a period of around 1500 years. Each writer wrote with a different style, from a different perspective, to a different audience, for a different purpose. We should expect some minor differences. However, a difference is not a contradiction. It is only an error if there is absolutely no conceivable way the verses or passages can be reconciled. Even if an answer is not available right now, that does not mean an answer does not exist. Many have found a supposed error in the Bible in relation to history or geography only to find out that the Bible is correct once further archaeological evidence is discovered.
http://www.gotquestions.org/Bible-errors.html
The Big Book of Bible Difficulties: Clear and Concise Answers from Genesis to Revelation
By: Norman L. Geisler, Thomas Howe
http://www.christianbook.com/difficulties-clear-concise-answers-genesis-revelation/norman-geisler/9780801071584/pd/071584?event=AFF&p=1011693&