3 Notes Theory Things   William Wieland
Half StepsWhole StepsMajor Triad1 – 5 – 1Octaves
Play on the Piano: Half Steps (ฝ) — next to one another on the piano keyboard
Whole Steps (W) — lowest 3 notes of any Major 5-finger Pattern
Major Triad (M) — bottom, middle & top notes of any Major 5-finger Pattern
1 – 5 – 1 (5) — 1 & 5 are the lowest & highest notes of any Major 5-finger Pattern
Octaves (8) — same pitch name
Sing: Half Steps — the closest pitches most musicians sing
You can sing the rest with notes of the major scale, Numbers or Solf่ge, ascending or (descending).
Whole Steps   —   1, 2, 3   (3, 2, 1)   —   do, re, mi   (mi, re, do)
Major Triad   —   1, 3, 5   (5, 3, 1)   —   do, mi, sol   (sol, mi, do)
1 – 5 – 1   —   1, 5, 8   (8, 5, 1)   —   do, sol, do   (do, sol, do)
Octaves   —   same number   —   same solf่ge
Familiar Tunes: Half Steps   —   The Entertainer (up)   —   "Wah, wah, wah!" (down)
Whole Steps   —   Fr่re Jacques (up)   —   Three Blind Mice (down)
Major Triad   —   Kum Ba Yah (up)   —   The Star-Spangled Banner (down)
1 – 5 – 1   —   2001: A Space Odyssey (up)   —   Superman Theme (down)
Practice Quiz:  (If you found that example helpful, please ask me to create more.)

(8 questions—The high note indicates which question is next by how often it is struck.)