Which charts - and what number do they have to reach?
If your definition of hit is one that makes the charts "Keep yourself alive" got to number 89 in the US charts and so is their first hit - using YOUR definition of hit !!!
I don't see how a single that reached the top 10 can NOT be considered a hit. Hazlinny hasn't yet revealed the quiz compiler's answer but it should be Seven Seas of Rhye (I doubt a local quiz would take the US charts into consideration).