Ravi says a magnet will pull any metal — a coin, an aluminium spoon, a copper wire, all of them

Why

Ravi is treating 'metal' and 'magnetic' as the same thing, probably because the metals he has tested a magnet on — a steel almirah, an iron nail — did stick. But only a few metals are actually attracted to a magnet: iron, nickel, and cobalt, plus steel, which is mostly iron. Most metals — aluminium, copper, gold, silver, brass, zinc — feel nothing from a magnet at all. Test it: hold a magnet near an aluminium spoon and a steel spoon — the steel one jumps to it, the aluminium one does not move; try a copper wire and a pure-copper coin and the magnet ignores them. His sister is right: only iron, nickel, cobalt, and iron-based steel are magnetic — being a metal is not the same as being attracted to a magnet.