'Seventy five' in the Bible

So Abram departed [in faithful obedience] as the Lord had directed him; and Lot [his nephew] left with him. Abram was seventy-five years old when he left Haran.

Then his wife Zeresh and all his friends said to him, “Have a gallows fifty cubits high made, and in the morning ask the king to have Mordecai hanged on it; then go joyfully to the banquet with the king.” And the advice pleased Haman, so he had the gallows made.

Then Joseph sent and invited Jacob his father and all his relatives to come to him, seventy-five persons in all.