  We formulate a problem on diamagnetic levitation, which may be suitable for
specialized high-school or first-year students in physical sciences. We guide
the students, step-by-step, through the physics of diamagnetic levitation. The
calculations are simplified by assuming a ring-shaped geometry of the
diamagnetic object residing above a magnetic dipole. This problem was
originally intended for the International Physics Olympiad 2016 (IPHO 2016),
but was finally deemed surplus and therefore not set.
