How Old Is Ann?

In the early 1900s, a mathematical puzzle about the ages of Mary and Ann became a viral sensation across America, spawning songs, theatrical productions, and widespread public debate. The puzzle—"Mary is 24 years old. She is twice as old as Ann was when Mary was as old as Ann is now. How old is Ann?"—captivated the nation and revealed how easily people misread or misunderstood the problem, with many arriving at incorrect answers. A 1924 New York Times article noted that the puzzle's popularity demonstrated both the widespread appeal of such brain-teasers and the general lack of logical reasoning among the American public.