Some scientists now believe since the universe is so much math that it begs for a creator.
That being said, believing that the universe is only a couple thousand years old because of the life times of Adam on through until today has its flaws, too.
The God that always was and always will be - as an eternal being - probably did not count existence via time as the main source of measurement.
Adam & Eve, once created, probably lived by these same terms and would had only counted their life existence after being kicked out of the garden.
It is very possible that we don't have any idea the total time Adam and Eve existed, only the time that they lived as being doomed by death. They could had existed billions of years for all we know.
Don't believe in my theory? Good. Don't.
Jesus is the Light. The Way. 'The Truth!'
The one thing about The Truth, once you recognize it as the truth, all lies must face off against this Truth.
This is also the gist of science. Good science.
The Truth.
If your whole faith is based on the world only being 6,000 years old, yet science claims it's billions of years older than that, you have to ask yourself, why all the evidence to the contrary? Fossils, petrified wood, weathered mountains.
God is not the deceiver. God is The Truth. Instead of limiting your knowledge of The Truth: Expand it.