A quindecennial event happens every how many years?

Which quarterback wore No. 16 for the San Francisco 49ers? What word names a quick kiss or part of a primitive typing style? What word names a quick verbal reply or a closed laboratory vessel with a long neck? What is a quickly taken, informal photo called? A quintuplet has at least how many siblings? Rabelais wrote "Gargantua and..." whom? The term "buppie" is short for what? What is a race run by pairs with their ankles tied together called?