How many generations were there from Adam to Abraham?
Luke: Twenty ([iii, 34–38]).
Luke makes less than half as many generations from Adam to Abraham in a period of two thousand years as he does from David to Jesus in a period of one thousand years.
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How many generations were there between Rachab, the mother of Booz, and David?
Matthew: Three—Booz, Obed and Jesse ([i, 5, 6]).
Rachab lived at Jericho when it was taken by the Israelites. Jericho was taken 1451 B. C., the year that Moses died. David was born 1085 B. C.—nearly four centuries later.