How well do you know DC's burgers? Take our Burger Master Quiz to find out. Below we’ve chosen pictures of twelve excellent burgers found across the city. Two readers that guess the most of these correctly and send in their answers to firstname.lastname@example.org will win prize packages—including $50 gift cards—from a burger joint set to hit town next month, Shake Shack. If there are more than two perfect submissions, the winners will be chosen randomly after the Friday, April 29 5 PM deadline. Answers will be revealed next week. Best of luck.