2 .
So far as the majority of Christians are concerned, most of the following assertions / descriptions regarding the Old Testament are broadly true. Which one is NOT?
The Old Testament includes the narratives and much of the cultural heritage of the Jews who are (&/or were) 'God's Chosen People', such as the earliest stories in Genesis and Exodus, along with the Psalms (the 'hymnbook' of Judaism, with which Jesus grew up and frequently quoted), so studying it gives a vital perspective on God's dealings with humankind
The Old Testament represents how things were, and stood, between God and humankind before He sent Jesus to live amongst us on earth. Some of the teachings have been superseded by His example and teaching (No longer 'an eye for an eye and a tooth for a tooth', for instance)
While some of the writings of the Prophets may seem out-of-touch nowadays and more specific to their original times, there are useful and even classic lessons about human behaviour that we can still valuably draw from reading such Books
The Old Testament material has been almost completely superseded by the ministry of Jesus and His followers, and is only included in modern editions of the Holy Bible since the early believers insisted on keeping it in
As you might expect, there are a lot of numerological features, both explicit and implicit in the Bible, beginning perhaps with the Creation story in which God makes the world in six stages (two sub-cycles of 3 each, if you re-read early Genesis and look for the 'scheme') and then has a rest on the seventh.
(Going back a further level, there are whole scholarly literatures about how that story itself arose in this form, given that there were no humans on-hand to record it in 'real time' ... but that's already getting rather deeper than we need!)