Pentatonic Scales

There are many pentatonic but the most common in
western music are the Major Pentatonic & Minor Pentatonic

Penta means 5, tonic means tone
so it's a 5 tone scale.

The Major Pentatonic is the same as the Major Scale but you remove the 4th & the 7th degrees:

1. C (Tonic/Root note)
2. D (W)
3. E (W)
4. F (H)
5. G (W)
6. A (W)
7. B (W)
8. C (H)

Major Pentatonic Formula: 1-2-3-5-6

The Minor Pentatonic is the same as the Minor Scale except it has the 2nd & the 6th degree removed.

1. C (Tonic /Root note)
2. D (W)
3. Eb (H)
4. F (W)
5. G (W)
6. Ab (H)
7. Bb (W)
8. C (W)

Minor Pentatonic Formula: 1-b3-4-5-b7