Pentatonic and Blues Scales

The simplest scales are the pentatonic ones - they have only 5 notes. The blues scales have 6 notes. "m" stands for minor and "M" stands for major (the difference between a minor scale and its major correspondent - containing the same notes - is three frets. For example, the major correspondent of F#-minor is A-major, the major correspondent of A-minor is C-major). The blue bullets show the note to be added in order to transform a pentatonic scale to a blues one:

The next table shows the correspondence between the root of the scale and the fret on the guitar where a certain scale should be played. For instance, if you want to play in the root of A, you should start at the 5^th or 17^th fret, for the root of C, you should start at the 8^th or 20^th fret, for the root of Eb, you should start at the 11^th fret: