What test does Penelope use to choose a husband from among the suitors?

Penelope decides that she will marry the first suitor who can shoot an arrow through the holes of twelve axes set in a line.

Answer and Explanation:

The story of Penelope's Test is told in Book XXI of The Odyssey, and Odysseus' revenge upon the suitors is told in Book XXII. The test that Penelope uses to choose her husband is to set twelve axe handles upright in a line in the sand such that the holes in the handles all form a straight line. After that, they have to shoot an arrow through the twelve axe handles. If they completed this, they would win her hand in marriage.