This GCSE RE quiz challenges you on the Holy Bible. The Scriptural bedrock of Christianity is, of course, the Holy Bible: a collection of rather over 50 separate ‘books’ or documents, written by a variety of people over a total span of several hundred years.
Most of these authors would have felt personally impelled by God to commit their experiences, reflections and/or wisdom into written form in an age where quantities of writing materials could be hard to obtain; and while some of them refer to one another (to prior books, such as the Old Testament histories; and, in the case of the prophets, to events yet-to-come historically ~ including the earthly ministry of Jesus), many of the writings were done ‘for the sake of it’ rather than in any awareness that the material might then become ‘canonical’, i.e. formally included for the spiritual edification of generations yet long unborn.
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!)