Friday, April 19, 2013
Brain Teaser 4/19/2013
One of the most famous puzzles in the math world is "How Old Is Ann?" Here's another variation. Ann is now exactly two-fifths of her older sister's age, and two years from now she will be one-half of her older sister's age. Conversely, two years ago, Ann was only one-fourth the age of her older sister's age at that time. How old is Ann now?