Question

What key is this written in??

Answer 1

Looking at the key signature: no flats and no sharps means we are either in C major or A minor. To distinguish between these, check for the 7th note on each scale - if it’s a minor key, the 7th note should be raised one semitone (G sharp in this case).

Answer 2

Like I said, read the sheet music and look for any raised semi tone G

Answer 3

Hint: look at the bass line for any potential G#