Welcome to the Ultimate Flag Teaser, a challenging quiz designed to test your knowledge of national flags from around the world. Flags are more than just colorful pieces of fabric; they represent a country's history, culture, values, and identity. In this quiz, you'll be presented with two images side by side for each question: one is the authentic national flag, and the other is a cleverly altered version that's similar but incorrect. Your task is to identify which one—left or right—is the real deal. We've crafted these deceptive alternatives to mimic common mistakes or subtle differences, making it tricky even for seasoned trivia enthusiasts. This quiz features 40 questions, starting with some well-known flags to ease you in, then ramping up to more obscure or nuanced ones. At the end, based on your score, you'll get a personalized evaluation to reflect on your performance and learn more about global vexillology—the study of flags. Good luck, and may your flag knowledge fly high!