Natural minor: T S T T S T T (listen for 3rd note) (starts on 6th of Maj)
Harmonic minor: T S T T S 1.5T S (listen for 7th note)
Melodic minor: T S T T T T S + T T S T T S T (listen for different up and down)
Key [Maj - 3 = Min]
C Maj / A min
G Maj / E min -> F#
F Maj / D min -> B♭
D Maj / B min -> F#B#
Intervals [Maj - 1 = Min]
*Remember to count from the note
M2 - 2s
M3 - 4s
P4 - 5s
P5 - 7s
M6 - 9s
M7 - 11s
P8/Octave - 12s
Intervals trick
m2 ~ sharks theme song
M2 ~ do re
P4 ~ Australians
P5 ~ movie intro
M7 ~ sounds funky
P8 ~ Somewhere
The bottom 3rd in a Major triad is a major 3rd. The top 3rd in a Major triad is a minor. The interval from the lowest note to the highest note in a Major triad is a perfect5th.