What is the significance of SEVEN brothers in Luke 20:29?

[tonychanyt]

Luke 20:

27 Then some of the Sadducees, who say there is no resurrection, came to question Him. 28“Teacher,” they said, “Moses wrote for us that if a man’s brother dies and leaves a wife but no children, the man is to marry his brother’s widow and raise up offspring for him.d 29 Now there were seven brothers. The first one married a wife, but died childless. 30 Then the second 31 and the third married the widow, and in the same way all seven died, leaving no children. 32 And last of all, the woman died. 33 So then, in the resurrection, whose wife will she be? For all seven were married to her.”

The Sadducees could have made this argument with only 2 brothers. What is the point of elongating the argument with 7 brothers?

For the Jews, the number 7 symbolized perfection and completion. The Sadducees used 7 instead of any other number as a cultural and literary device, not a mathematical or logical one.

 

[a_ntv]

Seven are the day of the first week in Genesis, and it means the fullness of the ages.
So there is an other reading, not literal: the woman is Israel (or Jerusalem if you prefer), the husbands are the powers that ruled Israel during his history. Jesus teach that he women (Jerusalem) at the end will be free from all husbands and will stay with God as an angel.