0
And these are the names of the sons of Levi ... Kohath....
And the sons of Kohath; Amram....
And Amram took him Jochebed his father's sister to wife; and she bare him Aaron and Moses.... Exodus 6:16-20
The sons of Levi; ... Kohath....
And the sons of Kohath; Amram....
And the children of Amram; Aaron and Moses and Miriam. 1 Chronicles 6:1-3
The sons of Levi, namely,... Kohath....
The sons of Kohath; Amram....
he sons of Amram; Aaron and Moses.... 1 Chronicles 23:6-12
And Ephraim ... went in to his wife, she conceived, and bare a son, and he called his name Beriah, because it went evil with his house....And Rephah was his son ..., and Telah his son, and Tahan his son.
Laadan his son, Ammihud his son, Elishama his son.
Non his son, Jehoshuah his son. 1 Chronicles 7:22-27
There were ten generations between Ephraim and Joshua (Jehoshuah), who was a contempory of Moses. Since Ephraim was Levi's nephew, there must have been at least ten generations between Levi and Moses.
Credit: All That's Wrong with the Bible: Contradictions, Absurdities, and More by Johan David Conner