Key signature
Scales with flat key signatures
Table:
Major key
Number
of flats
Flat notes
Minor key
Enharmonic
equivalent

C major
0

A minor
None

F major
1
B♭
D minor
None

B♭ major
2
B♭, E♭
G minor
None

E♭ major
3
B♭, E♭, A♭
C minor
None

A♭ major
4
B♭, E♭, A♭, D♭
F minor
None

D♭ major
5
B♭, E♭, A♭, D♭, G♭
B♭ minor
C♯ major/A♯ minor

G♭ major
6
B♭, E♭, A♭, D♭, G♭, C♭
E♭ minor
F♯ major/D♯ minor

C♭ major
7
B♭, E♭, A♭, D♭, G♭, C♭, F♭
A♭ minor
B major/G♯ minor

Looking at the data within the table titled Key signature, section Scales with flat key signatures, write a short sentence answering the following question: How many flats do the keys of F and B♭ major have? Return your answer as JSON: {"answer": "YOUR ANSWER"}.

answer: F major (D minor) has one flat which is on the B; then B♭ major (G minor) has two flats (on B and E).