Numeral adjective hex (six) in the Gospels-Acts

(Translation from NRSV)

Matthew

17: 1Six (hex) days later, Jesus took with him Peter and James and his brother John and led them up a high mountain, by themselves.

Mark

9: 2Six (hex) days later, Jesus took with him Peter and James and John, and led them up a high mountain apart, by themselves. And he was transfigured before them,

Luke

4: 25But the truth is, there were many widows in Israel in the time of Elijah, when the heaven was shut up three years and six (hex) months, and there was a severe famine over all the land;
13: 14But the leader of the synagogue, indignant because Jesus had cured on the sabbath, kept saying to the crowd, "There are six (hex) days on which work ought to be done; come on those days and be cured, and not on the sabbath day."

John

2: 6Now standing there were six (hex) stone water jars for the Jewish rites of purification, each holding twenty or thirty gallons.
2: 20The Jews then said, "This temple has been under construction for forty-six (hex) years, and will you raise it up in three days?"
12: 1Six (hex) days before the Passover Jesus came to Bethany, the home of Lazarus, whom he had raised from the dead.

Acts

11: 12The Spirit told me to go with them and not to make a distinction between them and us. These six (hex) brothers also accompanied me, and we entered the man's house.
18: 11He stayed there a year and six (hex) months, teaching the word of God among them.
27: 37(We were in all two hundred seventy-six (hex) persons in the ship.)