One might think that since there are as many minor keys as major keys that it would be necessary to learn a new series key signatures. Nicely, this isn't the case. It turns out that every major scale shares its set of notes (also meaning the same set of accidentals) with a minor scale. This happens because the pattern of whole steps and half steps in the major scale (W-W-H-W-W-W-H) actually contains the minor scale whole and half step pattern (W-H-W-W-H-W-W). Let's look at the C major scale below. It's been written in two octaves (it's basically just been written twice). See if you can find the minor whole step and half step pattern there.
Did you find it? It begins at the note A. If you clicked the button, you should see a pair of brackets showing the minor whole and half step pattern beginning at the 6th scale degree of the C scale, which is the A pure minor scale. We call this the relative minor of C major. The A minor and C major scale share the exact same set of notes, in this case no sharps or flats, and so you might imagine that they are both part of the same "family" of notes, and therefore "related." Furthermore, the relative minor scale of any major scale will always begin at the sixth scale degree. This means that you can always find the relative minor scale by looking at the sixth scale degree of a major scale.
Let's summarize our steps to finding minor key signatures:
Click the example button to see a key signature, then do your best to figure out the minor key, then click the answer button below it to reveal the correct answer. *Keep an eye on the clef!