The example demonstrates the classic "magic number" card trick, where a user mentally selects a number between 1 and 60 and then answers yes or no as six shuffled cards are presented one by one. Each card contains a distinct subset of numbers, and the user’s cumulative yes/no responses are used to compute the hidden number. The visualization uses D3 v4 to render SVG cards and animated transitions, scaling each card to the foreground for interaction and shrinking it after each answer. The final solution is revealed with a slow text fade-in after the last card, using D3’s transition and style methods.