Provided is what I consider to be the top-ten questions in the Bible.
Number 10: But the Lord God called to the man (Adam) and said to him, “Where are you?”
Genesis 3:9
Number 9: 3 When I look at your heavens, the work of your fingers, the moon and the stars, which you have set in place, 4 what is man that you are mindful of him, and the son of man that you care for him?
Psalm 8:3-4
Number 8: And Elijah came near to all the people and he said, “How long will you go limping between two different opinions? If the Lord is God, follow him; but if Baal, then follow him.”
1 Kings 18:21
Number 7: They (martyrs in heaven) cried out with a loud voice, “O Sovereign Lord, holy and true, how long before you will judge and avenge our blood on those who dwell on the earth?”
Revelation 6:10
Number 6: Then they (crowd) said to him (Jesus), “What must we do, to be doing the works of God?”
John 6:28
Number 5: 2 Now when John heard in prison about the deeds of the Christ, he sent word by his disciples 3 and said to him (Jesus), “Are you the one who is to come, or shall we look for another?”
Matthew 11:2-3
Number 4: When the disciples heard this, they were greatly astonished, saying, “Who then can be saved?”
Matthew 19:25
Number 3: Who can say, “I have made my heart pure; I am clean from my sin”?
Proverbs 20:9
Number 2: Then he (Philippian jailer) brought them (Paul and Silas) out and said, “Sirs, what must I do to be saved?”
Acts 16:30
Number 1: He (Jesus) said to them (disciples), “But who do you say that I am?”
Matthew 16:15
I would be curious to know what other questions from the Bible you would include on your list.

Here’s my quick list of others:
8 And I heard the voice of the Lord saying, “Whom shall I send, and who will go for us?” – Isaiah 6:8
“For who has known the mind of the Lord,
or who has been his counselor?”
“Or who has given a gift to him
that he might be repaid?”
Acts 11:34-35
JHowe
Well, there you go! Two more pertinent questions. The Bible is replete with questions that must be answered.
One more to add;
15When they had eaten, Jesus said to Simon Peter, Simon, son of John, do you love Me more than these [others do--with reasoning, intentional, spiritual devotion, as one loves the Father]? He said to Him, Yes, Lord, You know that I love You [that I have deep, instinctive, personal affection for You, as for a close friend]. He said to him, Feed My lambs.
16Again He said to him the second time, Simon, son of John, do you love Me [with reasoning, intentional, spiritual devotion, as one loves the Father]? He said to Him, Yes, Lord, You know that I love You [that I have a deep, instinctive, personal affection for You, as for a close friend]. He said to him, Shepherd (tend) My sheep.
17He said to him the third time, Simon, son of John, do you love Me [with a deep, instinctive, personal affection for Me, as for a close friend]? Peter was grieved (was saddened and hurt) that He should ask him the third time, Do you love Me? And he said to Him, Lord, You know everything; You know that I love You [that I have a deep, instinctive, personal affection for You, as for a close friend]. Jesus said to him, Feed My sheep.