Read Sherlock Holmes stories way past your bedtime? Solve the crime before Hercule Poirot even arrives on the scene? Have a Nancy Drew plush toy? If you love a good murder mystery as much as we do, try your hand at our top 10 whodunit riddles: 1. Two girls order iced tea with free refills. One girl drinks four glasses in the time it takes the other to drink just one. The girl who drank the single glass dies, but the other lives. All the drinks were poisoned. How did the girl