I tried to pull out particular verses that especially speak of only God knowing the answer to these questions, because He is creator of all. Unfortunately, it skewed the continuity of all God said, so I've included the whole chapter. Feel free to read the other three chapters of Job in your Bible. Job 38 and 39 are the two previous posts and will Job 41 will be the next post.
Moreover the Lord answered Job, and said, Shall he that contendeth withe Almighty instruct Him? he that reproveth God, let him answer it. Then Job answered the Lord, and said, Behold, I am vile; what shall I answer Thee? I will lay mine hand upon my mouth. Once have I spoken; but I will not answer: yea, twice; but I will proceed no further. Then answered the Lord unto Job out of the whirlwind and said, Gird up thy loins now like a man: I will demand of thee and declare thou unto Me. Wilt thou also disannul My judgment? wilt thou condemn Me, that thou mayest be righteous? Hast thou and arm like God? or canst thou thunder with a voice like Him? Deck thyself now with majesty and excellency; and array thyself with glory and beauty. Cast abroad the rage of they wrath: and behold every one that is proud, and abase him. Look on every one that is proud, and bring him low; and tread down the wicked in their place. Hide them in the dust together; and bind their faces in secret. Then will I also confess unto thee that thine own right hand can save thee. Behold now behemoth, which I made with thee, he eateth grass as an ox. Low now, his strength is in his loins, and his force is in the navel of his belly. He moveth his tail like a cedar: the sinews of his stones are wrapped together. His bones are as strong pieces of brass; his bones are like bars of iron. He is the chief of the ways of God: He that made him can make His sword to approach unto him. Surely the mountains bring him forth food, where all the beasts of the field play. He lieth under the shady trees, in the covert of the reed and fens. The shady trees cover him with their shadow; the willows of the brook compass him about. Behold, he drinketh up a river, and hasteth not: he trusteth that he can draw up Jordan into his mouth. He taketh it with his eyes: his nose pierceth through snares. Job, Chapter 40: 1-24
Job, Chapter 41 will be the next post in God's answer to Job and those that challenged Job.