Happy Numbers offer a fun platform for exploring numerical patterns, making conjectures, and investigating mathematical thought in recreational mathematics.
Chibnall, C. [Writer], & Mckinnon, D. [Director]. (2007, May 19). 42 (Season 29, Episode 7) [TV series 3]. In
Russell T.Davies & JulieGardner (Executive Producers), Dr. Who. British Broadcasting Corporation One.