You get one month to prepare. For the geese, you only can use your bare hands and all three will come at you at the same time. For the bear, you can use any one weapon invented before 500 AC.
You receive $100,000 for each goose killed, or $10,000,000 if you kill the bear.
Bear, poisoned slowly over the preceding month, and then grab the geese by their necks and swing their bodies in a circle to snap their vertebrae. Done. Easiest 10.2 mil.