Name the scale

Seven keys light up in a row, the orange root at the bottom. Which scale is it?

The 3rd above the root decides. Four semitones up is the major scale; three is the natural minor. Check the 6th and 7th if you want confirmation — minor flattens those too.

Careful: C major and A natural minor use the same seven keys. The orange root is what tells them apart.

root to 3rd: 4 semitones = major · 3 = natural minor

Seven lit keys from C, major 3rd on top: C major.

Practise this in the trainer — it opens with this lesson the first time the concept comes up.