Of course, the last C, the eighth note is a duplicate note, one octave higher. This scale is also very easy to form on piano and keyboard because it makes use of white keys only. The simplest major scale to write is C major, because it requires no sharps or flats. This diatonic scale is one of the most commonly used scales and is the first one you should learn as a piano or music student. In this lesson, we will learn all about major scales.