Explores why certain numbers are seen as lucky or unlucky across different cultures. It delves into the fear of 13 (triskaidekaphobia), the widespread belief in 7 as a symbol of perfection and luck, and the avoidance of the number 4 in East Asia due to its association with death. The episode also examines the role of numerology, cultural traditions, and psychological factors in shaping these beliefs, as well as how they influence real-world behaviors—from property values to personal choices.