Video narration
Does a quantum computer really try every answer at once? A qubit is a quantum information unit; its state gives an algorithm possibilities to work with. Think of ripples crossing on water: they can strengthen or weaken. That's only an analogy for interference, not a literal picture of a qubit. The advantage isn't simply trying every answer at once: interference can make useful outcomes more likely. No. You measure one result, and this can help with certain problems, not everything.